build: optionally build and install with meson

This commit adds several meson.build, which successfully build and install Lix executables, libraries, and headers. Meson does not yet build docs, Perl bindings, or run tests, which will be added in following commits. As such, this commit does not remove the existing build system, or make it the default, and also as such, this commit has several FIXMEs and TODOs as notes for what should be done before the existing autoconf + make buildsystem can be removed and Meson made the default. This commit does not modify any source files. A Meson-enabled build is also added as a Hydra job, and to `nix flake check`. Change-Id: I667c8685b13b7bab91e281053f807a11616ae3d4
2024-03-18 19:32:37 -06:00
1148 changed files with 37390 additions and 36693 deletions
--- a/.clang-format
+++ b/.clang-format
@ -48,3 +48,4 @@ PointerAlignment: Middle
 SortIncludes: Never
 SpaceAfterCStyleCast: true
 SpaceAfterTemplateKeyword: false
+
--- a/.clang-tidy
+++ b/.clang-tidy
@ -1,35 +0,0 @@
-UseColor: true
-Checks:
-  - -*
-  - bugprone-*
-    # too many warnings
-  - -bugprone-assignment-in-if-condition
-    # too many warnings
-  - -bugprone-narrowing-conversions
-    # kind of nonsense
-  - -bugprone-easily-swappable-parameters
-    # too many warnings for now
-  - -bugprone-implicit-widening-of-multiplication-result
-    # Lix's exception handling is Questionable
-  - -bugprone-empty-catch
-    # many warnings
-  - -bugprone-unchecked-optional-access
-    # many warnings, seems like a questionable lint
-  - -bugprone-branch-clone
-    # all thrown exceptions must derive from std::exception
-  - hicpp-exception-baseclass
-    # capturing async lambdas are dangerous
-  - cppcoreguidelines-avoid-capturing-lambda-coroutines
-    # crimes must be appropriately declared as crimes
-  - cppcoreguidelines-pro-type-cstyle-cast
-  - lix-*
-    # This can not yet be applied to Lix itself since we need to do source
-    # reorganization so that lix/ include paths work.
-  - -lix-fixincludes
-    # This lint is included as an example, but the lib function it replaces is
-    # already gone.
-  - -lix-hasprefixsuffix
-
-
-CheckOptions:
-  bugprone-reserved-identifier.AllowedIdentifiers: '__asan_default_options'
--- a/.editorconfig
+++ b/.editorconfig
@ -24,8 +24,3 @@ indent_size = 4
 # Match diffs, avoid to trim trailing whitespace
 [*.{diff,patch}]
 trim_trailing_whitespace = false
-
-[*.md]
-indent_style = space
-indent_size = 2
-max_line_length = 0
--- a/.envrc
+++ b/.envrc
@ -1,5 +0,0 @@
-# shellcheck shell=bash
-source_env_if_exists .envrc.local
-# Use native-clangStdenvPackages to get clangd by default.
-use flake ".#${LIX_SHELL_VARIANT:-native-clangStdenvPackages}" "${LIX_SHELL_EXTRA_ARGS[@]}"
-export GTEST_BRIEF=1
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@ -0,0 +1,18 @@
+# Pull requests concerning the listed files will automatically invite the respective maintainers as reviewers.
+# This file is not used for denoting any kind of ownership, but is merely a tool for handling notifications.
+#
+# Merge permissions are required for maintaining an entry in this file.
+# For documentation on this mechanism, see https://help.github.com/articles/about-codeowners/
+
+# Default reviewers if nothing else matches
+* @edolstra
+
+# This file
+.github/CODEOWNERS @edolstra
+
+# Public documentation
+/doc @fricklerhandwerk
+*.md @fricklerhandwerk
+
+# Libstore layer
+/src/libstore @thufschmitt
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@ -25,7 +25,7 @@ you probably want to file an issue at https://github.com/NixOS/nixpkgs/issues.

 A clear and concise description of what you expected to happen.

-## `nix --version` output
+## `nix-env --version` output

 ## Additional context

--- a/.github/ISSUE_TEMPLATE/installer.md
+++ b/.github/ISSUE_TEMPLATE/installer.md
@ -9,7 +9,7 @@ assignees: ''

 ## Platform

-<!-- select the platform on which you tried to install Lix -->
+<!-- select the platform on which you tried to install Nix -->

 - [ ] Linux: <!-- state your distribution, e.g. Arch Linux, Ubuntu, ... -->
 - [ ] macOS
--- a/.github/ISSUE_TEMPLATE/missing_documentation.md
+++ b/.github/ISSUE_TEMPLATE/missing_documentation.md
@ -19,10 +19,9 @@ assignees: ''

 <!-- make sure this issue is not redundant or obsolete -->

- [ ] checked [latest Lix manual] \([source]\)
- [ ] checked [documentation issues] and [recent documentation changes] for possible duplicates
+- [ ] checked [latest Nix manual] \([source])
+- [ ] checked [open documentation issues and pull requests] for possible duplicates

-[latest Nix manual]: https://docs.lix.systems/manual/lix/nightly
-[source]: https://git.lix.systems/lix-project/lix/src/main/doc/manual/src
-[documentation issues]: https://git.lix.systems/lix-project/lix/issues?labels=151&state=all
-[recent documentation changes]: https://gerrit.lix.systems/q/p:lix+path:%22%5Edoc/manual/.*%22
+[latest Nix manual]: https://nixos.org/manual/nix/unstable/
+[source]: https://github.com/NixOS/nix/tree/master/doc/manual/src
+[open documentation issues and pull requests]: https://github.com/NixOS/nix/labels/documentation
--- a/.github/STALE-BOT.md
+++ b/.github/STALE-BOT.md
@ -0,0 +1,35 @@
+# Stale bot information
+
+- Thanks for your contribution!
+- To remove the stale label, just leave a new comment.
+- _How to find the right people to ping?_ &rarr; [`git blame`](https://git-scm.com/docs/git-blame) to the rescue! (or GitHub's history and blame buttons.)
+- You can always ask for help on [our Discourse Forum](https://discourse.nixos.org/) or on [Matrix - #nix:nixos.org](https://matrix.to/#/#nix:nixos.org).
+
+## Suggestions for PRs
+
+1. GitHub sometimes doesn't notify people who commented / reviewed a PR previously, when you (force) push commits. If you have addressed the reviews you can [officially ask for a review](https://docs.github.com/en/free-pro-team@latest/github/collaborating-with-issues-and-pull-requests/requesting-a-pull-request-review) from those who commented to you or anyone else.
+2. If it is unfinished but you plan to finish it, please mark it as a draft.
+3. If you don't expect to work on it any time soon, closing it with a short comment may encourage someone else to pick up your work.
+4. To get things rolling again, rebase the PR against the target branch and address valid comments.
+5. If you need a review to move forward, ask in [the Discourse thread for PRs that need help](https://discourse.nixos.org/t/prs-in-distress/3604).
+6. If all you need is a merge, check the git history to find and [request reviews](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/requesting-a-pull-request-review) from people who usually merge related contributions.
+
+## Suggestions for issues
+
+1. If it is resolved (either for you personally, or in general), please consider closing it.
+2. If this might still be an issue, but you are not interested in promoting its resolution, please consider closing it while encouraging others to take over and reopen an issue if they care enough.
+3. If you still have interest in resolving it, try to ping somebody who you believe might have an interest in the topic. Consider discussing the problem in [our Discourse Forum](https://discourse.nixos.org/).
+4. As with all open source projects, your best option is to submit a Pull Request that addresses this issue. We :heart: this attitude!
+
+**Memorandum on closing issues**
+
+Don't be afraid to close an issue that holds valuable information. Closed issues stay in the system for people to search, read, cross-reference, or even reopen--nothing is lost! Closing obsolete issues is an important way to help maintainers focus their time and effort.
+
+## Useful GitHub search queries
+
+- [Open PRs with any stale-bot interaction](https://github.com/NixOS/nix/pulls?q=is%3Apr+is%3Aopen+commenter%3Aapp%2Fstale+)
+- [Open PRs with any stale-bot interaction and `stale`](https://github.com/NixOS/nix/pulls?q=is%3Apr+is%3Aopen+commenter%3Aapp%2Fstale+label%3A%22stale%22)
+- [Open PRs with any stale-bot interaction and NOT `stale`](https://github.com/NixOS/nix/pulls?q=is%3Apr+is%3Aopen+commenter%3Aapp%2Fstale+-label%3A%22stale%22+)
+- [Open Issues with any stale-bot interaction](https://github.com/NixOS/nix/issues?q=is%3Aissue+is%3Aopen+commenter%3Aapp%2Fstale+)
+- [Open Issues with any stale-bot interaction and `stale`](https://github.com/NixOS/nix/issues?q=is%3Aissue+is%3Aopen+commenter%3Aapp%2Fstale+label%3A%22stale%22+)
+- [Open Issues with any stale-bot interaction and NOT `stale`](https://github.com/NixOS/nix/issues?q=is%3Aissue+is%3Aopen+commenter%3Aapp%2Fstale+-label%3A%22stale%22+)
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
--- a/.github/labeler.yml
+++ b/.github/labeler.yml
@ -0,0 +1,23 @@
+"documentation":
+  - doc/manual/*
+  - src/nix/**/*.md
+
+"store":
+  - src/libstore/store-api.*
+  - src/libstore/*-store.*
+
+"fetching":
+  - src/libfetchers/**/*
+
+"repl":
+  - src/libcmd/repl.*
+  - src/nix/repl.*
+
+"new-cli":
+  - src/nix/**/*
+
+"with-tests":
+  # Unit tests
+  - src/*/tests/**/*
+  # Functional and integration tests
+  - tests/functional/**/*
--- a/.github/stale.yml
+++ b/.github/stale.yml
@ -0,0 +1,9 @@
+# Configuration for probot-stale - https://github.com/probot/stale
+daysUntilStale: 180
+daysUntilClose: false
+exemptLabels:
+  - "critical"
+  - "never-stale"
+staleLabel: "stale"
+markComment: false
+closeComment: false
--- a/.github/workflows/backport.yml
+++ b/.github/workflows/backport.yml
@ -0,0 +1,32 @@
+name: Backport
+on:
+  pull_request_target:
+    types: [closed, labeled]
+permissions:
+  contents: read
+jobs:
+  backport:
+    name: Backport Pull Request
+    permissions:
+      # for zeebe-io/backport-action
+      contents: write
+      pull-requests: write
+    if: github.repository_owner == 'NixOS' && github.event.pull_request.merged == true && (github.event_name != 'labeled' || startsWith('backport', github.event.label.name))
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          # required to find all branches
+          fetch-depth: 0
+      - name: Create backport PRs
+        # should be kept in sync with `version`
+        uses: zeebe-io/backport-action@v1.4.0
+        with:
+          # Config README: https://github.com/zeebe-io/backport-action#backport-action
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          github_workspace: ${{ github.workspace }}
+          pull_description: |-
+            Automatic backport to `${target_branch}`, triggered by a label in #${pull_number}.
+          # should be kept in sync with `uses`
+          version: v0.0.5
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -0,0 +1,135 @@
+name: "CI"
+
+on:
+  pull_request:
+  push:
+
+permissions: read-all
+
+jobs:
+
+  tests:
+    needs: [check_secrets]
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - uses: cachix/install-nix-action@v23
+      with:
+        # The sandbox would otherwise be disabled by default on Darwin
+        extra_nix_config: "sandbox = true"
+    - run: echo CACHIX_NAME="$(echo $GITHUB_REPOSITORY-install-tests | tr "[A-Z]/" "[a-z]-")" >> $GITHUB_ENV
+    - uses: cachix/cachix-action@v12
+      if: needs.check_secrets.outputs.cachix == 'true'
+      with:
+        name: '${{ env.CACHIX_NAME }}'
+        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - run: nix --experimental-features 'nix-command flakes' flake check -L
+
+  check_secrets:
+    permissions:
+      contents: none
+    name: Check Cachix and Docker secrets present for installer tests
+    runs-on: ubuntu-latest
+    outputs:
+      cachix: ${{ steps.secret.outputs.cachix }}
+      docker: ${{ steps.secret.outputs.docker }}
+    steps:
+      - name: Check for secrets
+        id: secret
+        env:
+          _CACHIX_SECRETS: ${{ secrets.CACHIX_SIGNING_KEY }}${{ secrets.CACHIX_AUTH_TOKEN }}
+          _DOCKER_SECRETS: ${{ secrets.DOCKERHUB_USERNAME }}${{ secrets.DOCKERHUB_TOKEN }}
+        run: |
+          echo "::set-output name=cachix::${{ env._CACHIX_SECRETS != '' }}"
+          echo "::set-output name=docker::${{ env._DOCKER_SECRETS != '' }}"
+
+  installer:
+    needs: [tests, check_secrets]
+    if: github.event_name == 'push' && needs.check_secrets.outputs.cachix == 'true'
+    runs-on: ubuntu-latest
+    outputs:
+      installerURL: ${{ steps.prepare-installer.outputs.installerURL }}
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - run: echo CACHIX_NAME="$(echo $GITHUB_REPOSITORY-install-tests | tr "[A-Z]/" "[a-z]-")" >> $GITHUB_ENV
+    - uses: cachix/install-nix-action@v23
+      with:
+        install_url: https://releases.nixos.org/nix/nix-2.13.3/install
+    - uses: cachix/cachix-action@v12
+      with:
+        name: '${{ env.CACHIX_NAME }}'
+        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - id: prepare-installer
+      run: scripts/prepare-installer-for-github-actions
+
+  installer_test:
+    needs: [installer, check_secrets]
+    if: github.event_name == 'push' && needs.check_secrets.outputs.cachix == 'true'
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v4
+    - run: echo CACHIX_NAME="$(echo $GITHUB_REPOSITORY-install-tests | tr "[A-Z]/" "[a-z]-")" >> $GITHUB_ENV
+    - uses: cachix/install-nix-action@v23
+      with:
+        install_url: '${{needs.installer.outputs.installerURL}}'
+        install_options: "--tarball-url-prefix https://${{ env.CACHIX_NAME }}.cachix.org/serve"
+    - run: sudo apt install fish zsh
+      if: matrix.os == 'ubuntu-latest'
+    - run: brew install fish
+      if: matrix.os == 'macos-latest'
+    - run: exec bash -c "nix-instantiate -E 'builtins.currentTime' --eval"
+    - run: exec sh -c "nix-instantiate -E 'builtins.currentTime' --eval"
+    - run: exec zsh -c "nix-instantiate -E 'builtins.currentTime' --eval"
+    - run: exec fish -c "nix-instantiate -E 'builtins.currentTime' --eval"
+    - run: exec bash -c "nix-channel --add https://releases.nixos.org/nixos/unstable/nixos-23.05pre466020.60c1d71f2ba nixpkgs"
+    - run: exec bash -c "nix-channel --update && nix-env -iA nixpkgs.hello && hello"
+
+  docker_push_image:
+    needs: [check_secrets, tests]
+    if: >-
+      github.event_name == 'push' &&
+      github.ref_name == 'master' &&
+      needs.check_secrets.outputs.cachix == 'true' &&
+      needs.check_secrets.outputs.docker == 'true'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - uses: cachix/install-nix-action@v23
+      with:
+        install_url: https://releases.nixos.org/nix/nix-2.13.3/install
+    - run: echo CACHIX_NAME="$(echo $GITHUB_REPOSITORY-install-tests | tr "[A-Z]/" "[a-z]-")" >> $GITHUB_ENV
+    - run: echo NIX_VERSION="$(nix --experimental-features 'nix-command flakes' eval .\#default.version | tr -d \")" >> $GITHUB_ENV
+    - uses: cachix/cachix-action@v12
+      if: needs.check_secrets.outputs.cachix == 'true'
+      with:
+        name: '${{ env.CACHIX_NAME }}'
+        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - run: nix --experimental-features 'nix-command flakes' build .#dockerImage -L
+    - run: docker load -i ./result/image.tar.gz
+    - run: docker tag nix:$NIX_VERSION nixos/nix:$NIX_VERSION
+    - run: docker tag nix:$NIX_VERSION nixos/nix:master
+    - name: Login to Docker Hub
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+    - run: docker push nixos/nix:$NIX_VERSION
+    - run: docker push nixos/nix:master
--- a/.github/workflows/hydra_status.yml
+++ b/.github/workflows/hydra_status.yml
@ -0,0 +1,20 @@
+name: Hydra status
+
+permissions: read-all
+
+on:
+  schedule:
+    - cron: "12,42 * * * *"
+  workflow_dispatch:
+
+jobs:
+  check_hydra_status:
+    name: Check Hydra status
+    if: github.repository_owner == 'NixOS'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - run: bash scripts/check-hydra-status.sh
+
--- a/.github/workflows/labels.yml
+++ b/.github/workflows/labels.yml
@ -0,0 +1,24 @@
+name: "Label PR"
+
+on:
+  pull_request_target:
+    types: [edited, opened, synchronize, reopened]
+
+# WARNING:
+# When extending this action, be aware that $GITHUB_TOKEN allows some write
+# access to the GitHub API. This means that it should not evaluate user input in
+# a way that allows code injection.
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  labels:
+    runs-on: ubuntu-latest
+    if: github.repository_owner == 'NixOS'
+    steps:
+    - uses: actions/labeler@v4
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        sync-labels: false
--- a/.gitignore
+++ b/.gitignore
@ -1,5 +1,133 @@
+Makefile.config
+perl/Makefile.config
+
+# /
+/aclocal.m4
+/autom4te.cache
+/precompiled-headers.h.gch
+/config.*
+/configure
+/stamp-h1
+/svn-revision
+/libtool
+
+# /doc/manual/
+/doc/manual/*.1
+/doc/manual/*.5
+/doc/manual/*.8
+/doc/manual/generated/*
+/doc/manual/nix.json
+/doc/manual/conf-file.json
+/doc/manual/language.json
+/doc/manual/xp-features.json
+/doc/manual/src/SUMMARY.md
+/doc/manual/src/SUMMARY-rl-next.md
+/doc/manual/src/command-ref/new-cli
+/doc/manual/src/command-ref/conf-file.md
+/doc/manual/src/command-ref/experimental-features-shortlist.md
+/doc/manual/src/contributing/experimental-feature-descriptions.md
+/doc/manual/src/language/builtins.md
+/doc/manual/src/language/builtin-constants.md
+/doc/manual/src/release-notes/rl-next.md
+
+# /scripts/
+/scripts/nix-profile.sh
+/scripts/nix-profile-daemon.sh
+/scripts/nix-profile.fish
+/scripts/nix-profile-daemon.fish
+
+# /src/libexpr/
+/src/libexpr/lexer-tab.cc
+/src/libexpr/lexer-tab.hh
+/src/libexpr/parser-tab.cc
+/src/libexpr/parser-tab.hh
+/src/libexpr/parser-tab.output
+/src/libexpr/nix.tbl
+/src/libexpr/tests
+/tests/unit/libexpr/libnixexpr-tests
+
+# /src/libstore/
+*.gen.*
+/src/libstore/tests
+/tests/unit/libstore/libnixstore-tests
+
+# /src/libutil/
+/src/libutil/tests
+/tests/unit/libutil/libnixutil-tests
+
+/src/nix/nix
+
+/src/nix/doc
+
+# /src/nix-env/
+/src/nix-env/nix-env
+
+# /src/nix-instantiate/
+/src/nix-instantiate/nix-instantiate
+
+# /src/nix-store/
+/src/nix-store/nix-store
+
+/src/nix-prefetch-url/nix-prefetch-url
+
+/src/nix-collect-garbage/nix-collect-garbage
+
+# /src/nix-channel/
+/src/nix-channel/nix-channel
+
+# /src/nix-build/
+/src/nix-build/nix-build
+
+/src/nix-copy-closure/nix-copy-closure
+
+/src/error-demo/error-demo
+
+/src/build-remote/build-remote
+
+# /tests/functional/
+/tests/functional/test-tmp
+/tests/functional/common/vars-and-functions.sh
+/tests/functional/result*
+/tests/functional/restricted-innocent
+/tests/functional/shell
+/tests/functional/shell.drv
+/tests/functional/config.nix
+/tests/functional/ca/config.nix
+/tests/functional/dyn-drv/config.nix
+/tests/functional/repl-result-out
+/tests/functional/debugger-test-out
+/tests/functional/test-libstoreconsumer/test-libstoreconsumer
+
+# /tests/functional/lang/
+/tests/functional/lang/*.out
+/tests/functional/lang/*.out.xml
+/tests/functional/lang/*.err
+/tests/functional/lang/*.ast
+
+/perl/lib/Nix/Config.pm
+/perl/lib/Nix/Store.cc
+
+/misc/systemd/nix-daemon.service
+/misc/systemd/nix-daemon.socket
+/misc/systemd/nix-daemon.conf
+/misc/upstart/nix-daemon.conf
+
+/src/resolve-system-dependencies/resolve-system-dependencies
+
 outputs/

+*.a
+*.o
+*.o.tmp
+*.so
+*.dylib
+*.dll
+*.exe
+*.dep
+*~
+*.pc
+*.plist
+
 # GNU Global
 GPATH
 GRTAGS
@ -11,28 +139,16 @@ GTAGS

 # auto-generated compilation database
 compile_commands.json
-rust-project.json
+
+nix-rust/target

 result
 result-*

 .vscode/
-.direnv/

 # clangd and possibly more
 .cache/

 # Mac OS
 .DS_Store
-
-# ClangBuildAnalyzer output, see maintainers/buildtime_report.sh
-buildtime.bin
-
-.envrc.local
-# We generate this with a Nix shell hook
-/.pre-commit-config.yaml
-/.nocontribmsg
-/release
-
-# Rust build files when using Cargo (not actually supported for building but it spews the files anyway)
-/target/
--- a/.this-is-lix
+++ b/.this-is-lix
@ -1 +0,0 @@
-This is a file used by the dev shell shellHook in package.nix to check that this is actually a Lix repo before installing git hooks. Its contents have no meaning.
--- a/.version
+++ b/.version
@ -0,0 +1 @@
+2.90.0
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -1,53 +1,76 @@
-# Contributing to Lix
+# Contributing to Nix

-Welcome and thank you for considering contributing to Lix! We're currently in a soft release phase, and your support means a lot to us.
+Welcome and thank you for your interest in contributing to Nix!
+We appreciate your support.

-To ensure a smooth and effective contribution process, here is a summary of our guidelines:
-
-## Getting help?
-
-If you have any question regarding getting started or reporting bugs, feel free
-to reach out to us.
-
-On Matrix, we have a space at `#space:lix.systems`, composed of:
-
- [`#discuss:lix.systems`](https://matrix.to/#/#discuss:lix.systems) for discussions on Lix.
- [`#dev:lix.systems`](https://matrix.to/#/#dev:lix.systems) for the development channel on Lix.
+Reading and following these guidelines will help us make the contribution process easy and effective for everyone involved.

 ## Report a bug

- Check if your bug has already been reported in the [issue tracker](https://git.lix.systems/lix-project/lix/issues).
- If you can't find the bug or feature, please open a new issue.
+1. Check on the [GitHub issue tracker](https://github.com/NixOS/nix/issues) if your bug was already reported.

-We maintain a copy of the upstream Nix bugs. Their organisation can be read about [here](https://wiki.lix.systems/books/lix-contributors/page/bug-tracker-organisation).
+2. If you were not able to find the bug or feature [open a new issue](https://github.com/NixOS/nix/issues/new/choose)
+
+3. The issue templates will guide you in specifying your issue.
+   The more complete the information you provide, the more likely it can be found by others and the more useful it is in the future.
+   Make sure reported bugs can be reproduced easily.
+
+4. Once submitted, do not expect issues to be picked up or solved right away.
+   The only way to ensure this, is to [work on the issue yourself](#making-changes-to-nix).

 ## Report a security vulnerability

-For security vulnerabilities, reach out by email at `security at lix dot systems`.
+Check out the [security policy](https://github.com/NixOS/nix/security/policy).

-## Making changes to Lix
+## Making changes to Nix

-Before diving into making changes, we want to engage with you and your ideas.
+1. Check for [pull requests](https://github.com/NixOS/nix/pulls) that might already cover the contribution you are about to make.
+   There are many open pull requests that might already do what you intent to work on.
+   You can use [labels](https://github.com/NixOS/nix/labels) to filter for relevant topics.

-We have a few policies in effect; please take the time to familiarize yourself:
+2. Search for related issues that cover what you're going to work on. It could help to mention there that you will work on the issue.

- [Style guide on code](https://wiki.lix.systems/books/lix-contributors/page/code)
- [Freeze policy and recommended contributions](https://wiki.lix.systems/books/lix-contributors/page/freezes-and-recommended-contributions)
+   Issues labeled [good first issue](https://github.com/NixOS/nix/labels/good-first-issue) should be relatively easy to fix and are likely to get merged quickly.
+   Pull requests addressing issues labeled [idea approved](https://github.com/NixOS/nix/labels/idea%20approved) are especially welcomed by maintainers and will receive prioritised review.

-To avoid duplication of effort, it may be a good idea to check out the list of
-[pending pull requests](https://gerrit.lix.systems/q/status:open+-is:wip) (or "change lists", as Gerrit calls them). Once you have
-an idea of what you might want to do, we recommend dropping a message on our
-Matrix to ensure your contribution fits with our current schedule and plans
+3. Check the [Nix reference manual](https://nixos.org/manual/nix/unstable/contributing/hacking.html) for information on building Nix and running its tests.

-When you're ready and your changes are ready to go:
+   For contributions to the command line interface, please check the [CLI guidelines](https://nixos.org/manual/nix/unstable/contributing/cli-guideline.html).

- Submit your code.
-  - Submitting a GitHub PR [on our mirror](https://github.com/lix-project/lix) is totally ok if that's easier for you and your change is relatively small (300 lines or so).
+4. Make your changes!

-    We may ask you to resubmit it as a Gerrit CL if it is necessary for the change you're making.
-  - Our primary code review system is [our Gerrit instance](https://gerrit.lix.systems), where you can open a change list (CL).
-    If you're new to Gerrit, check out [our wiki page about Gerrit](https://wiki.lix.systems/books/lix-contributors/page/gerrit).
- Make sure to link any related issues.
- If needed, indicate that the change is 'work in progress'.
+5. [Create a pull request](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request) for your changes.
+   * Link related issues in your pull request to inform interested parties and future contributors about your change.
+   * Make sure to have [a clean history of commits on your branch by using rebase](https://www.digitalocean.com/community/tutorials/how-to-rebase-and-update-a-pull-request).
+     If your pull request closes one or multiple issues, note that in the description using `Closes: #<number>`, as it will then happen automatically when your change is merged.
+   * [Mark the pull request as draft](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/changing-the-stage-of-a-pull-request) if you're not done with the changes.

-You can obtain an account on our platforms by clicking "Sign In with GitHub" on the sign-in page.
+6. Do not expect your pull request to be reviewed immediately.
+   Nix maintainers follow a [structured process for reviews and design decisions](https://github.com/NixOS/nix/tree/master/maintainers#project-board-protocol), which may or may not prioritise your work.
+
+   Following this checklist will make the process smoother for everyone:
+
+   - [ ] Fixes an [idea approved](https://github.com/NixOS/nix/labels/idea%20approved) issue
+   - [ ] Tests, as appropriate:
+     - Functional tests – [`tests/functional/**.sh`](./tests/functional)
+     - Unit tests – [`src/*/tests`](./src/)
+     - Integration tests – [`tests/nixos/*`](./tests/nixos)
+   - [ ] User documentation in the [manual](..doc/manual/src)
+   - [ ] API documentation in header files
+   - [ ] Code and comments are self-explanatory
+   - [ ] Commit message explains **why** the change was made
+   - [ ] New feature or incompatible change: updated [release notes](./doc/manual/src/release-notes/rl-next.md)
+
+7. If you need additional feedback or help to getting pull request into shape, ask other contributors using [@mentions](https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#mentioning-people-and-teams).
+
+## Making changes to the Nix manual
+
+The Nix reference manual is hosted on https://nixos.org/manual/nix.
+The underlying source files are located in [`doc/manual/src`](./doc/manual/src).
+For small changes you can [use GitHub to edit these files](https://docs.github.com/en/repositories/working-with-files/managing-files/editing-files)
+For larger changes see the [Nix reference manual](https://nixos.org/manual/nix/unstable/contributing/hacking.html).
+
+## Getting help
+
+Whenever you're stuck or do not know how to proceed, you can always ask for help.
+The appropriate channels to do so can be found on the [NixOS Community](https://nixos.org/community/) page.
--- a/20
+++ b/20
@ -55,7 +55,7 @@ modified by someone else and passed on, the recipients should know
 that what they have is not the original version, so that the original
 author's reputation will not be affected by problems that might be
 introduced by others.
-
+
  Finally, software patents pose a constant threat to the existence of
 any free program.  We wish to make sure that a company cannot
 effectively restrict the users of a free program by obtaining a
@ -111,7 +111,7 @@ modification follow.  Pay close attention to the difference between a
 "work based on the library" and a "work that uses the library".  The
 former contains code derived from the library, whereas the latter must
 be combined with the library in order to run.
-
+
 		  GNU LESSER GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

@ -158,7 +158,7 @@ Library.
  You may charge a fee for the physical act of transferring a copy,
 and you may at your option offer warranty protection in exchange for a
 fee.
-
+
  2. You may modify your copy or copies of the Library or any portion
 of it, thus forming a work based on the Library, and copy and
 distribute such modifications or work under the terms of Section 1
@ -216,7 +216,7 @@ instead of to this License.  (If a newer version than version 2 of the
 ordinary GNU General Public License has appeared, then you can specify
 that version instead if you wish.)  Do not make any other change in
 these notices.
-
+
  Once this change is made in a given copy, it is irreversible for
 that copy, so the ordinary GNU General Public License applies to all
 subsequent copies and derivative works made from that copy.
@ -267,7 +267,7 @@ Library will still fall under Section 6.)
 distribute the object code for the work under the terms of Section 6.
 Any executables containing that work also fall under Section 6,
 whether or not they are linked directly with the Library itself.
-
+
  6. As an exception to the Sections above, you may also combine or
 link a "work that uses the Library" with the Library to produce a
 work containing portions of the Library, and distribute that work
@ -329,7 +329,7 @@ restrictions of other proprietary libraries that do not normally
 accompany the operating system.  Such a contradiction means you cannot
 use both them and the Library together in an executable that you
 distribute.
-
+
  7. You may place library facilities that are a work based on the
 Library side-by-side in a single library together with other library
 facilities not covered by this License, and distribute such a combined
@ -370,7 +370,7 @@ subject to these terms and conditions.  You may not impose any further
 restrictions on the recipients' exercise of the rights granted herein.
 You are not responsible for enforcing compliance by third parties with
 this License.
-
+
  11. If, as a consequence of a court judgment or allegation of patent
 infringement or for any other reason (not limited to patent issues),
 conditions are imposed on you (whether by court order, agreement or
@ -422,7 +422,7 @@ conditions either of that version or of any later version published by
 the Free Software Foundation.  If the Library does not specify a
 license version number, you may choose any version ever published by
 the Free Software Foundation.
-
+
  14. If you wish to incorporate parts of the Library into other free
 programs whose distribution conditions are incompatible with these,
 write to the author to ask for permission.  For software which is
@ -456,7 +456,7 @@ SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 DAMAGES.

 		     END OF TERMS AND CONDITIONS
-
+
           How to Apply These Terms to Your New Libraries

  If you develop a new library, and you want it to be of the greatest
@ -500,3 +500,5 @@ necessary.  Here is a sample; alter the names:
  Ty Coon, President of Vice

 That's all there is to it!
+
+
--- a/Cargo.lock
+++ b/Cargo.lock
@ -1,79 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-version = 3
-
-[[package]]
-name = "countme"
-version = "3.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7704b5fdd17b18ae31c4c1da5a2e0305a2bf17b5249300a9ee9ed7b72114c636"
-
-[[package]]
-name = "dissimilar"
-version = "1.0.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59f8e79d1fbf76bdfbde321e902714bf6c49df88a7dda6fc682fc2979226962d"
-
-[[package]]
-name = "expect-test"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e0be0a561335815e06dab7c62e50353134c796e7a6155402a64bcff66b6a5e0"
-dependencies = [
- "dissimilar",
- "once_cell",
-]
-
-[[package]]
-name = "hashbrown"
-version = "0.14.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
-
-[[package]]
-name = "lix-doc"
-version = "0.0.1"
-dependencies = [
- "expect-test",
- "rnix",
- "rowan",
-]
-
-[[package]]
-name = "once_cell"
-version = "1.19.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
-
-[[package]]
-name = "rnix"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb35cedbeb70e0ccabef2a31bcff0aebd114f19566086300b8f42c725fc2cb5f"
-dependencies = [
- "rowan",
-]
-
-[[package]]
-name = "rowan"
-version = "0.15.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a542b0253fa46e632d27a1dc5cf7b930de4df8659dc6e720b647fc72147ae3d"
-dependencies = [
- "countme",
- "hashbrown",
- "rustc-hash",
- "text-size",
-]
-
-[[package]]
-name = "rustc-hash"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
-
-[[package]]
-name = "text-size"
-version = "1.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f18aa187839b2bdb1ad2fa35ead8c4c2976b64e4363c386d45ac0f7ee85c9233"
--- a/Cargo.toml
+++ b/Cargo.toml
@ -1,6 +0,0 @@
-[workspace]
-resolver = "2"
-members = ["src/lix-doc"]
-
-[workspace.package]
-edition = "2021"
--- a/72
+++ b/72
@ -0,0 +1,72 @@
+include mk/build-dir.mk
+
+-include $(buildprefix)Makefile.config
+clean-files += $(buildprefix)Makefile.config
+
+ifeq ($(ENABLE_BUILD), yes)
+makefiles = \
+  mk/precompiled-headers.mk \
+  local.mk \
+  src/libutil/local.mk \
+  src/libstore/local.mk \
+  src/libfetchers/local.mk \
+  src/libmain/local.mk \
+  src/libexpr/local.mk \
+  src/libcmd/local.mk \
+  src/nix/local.mk \
+  src/resolve-system-dependencies/local.mk \
+  scripts/local.mk \
+  misc/bash/local.mk \
+  misc/fish/local.mk \
+  misc/zsh/local.mk \
+  misc/systemd/local.mk \
+  misc/launchd/local.mk \
+  misc/upstart/local.mk
+endif
+
+ifeq ($(ENABLE_BUILD)_$(ENABLE_TESTS), yes_yes)
+UNIT_TEST_ENV = _NIX_TEST_UNIT_DATA=unit-test-data
+makefiles += \
+  tests/unit/libutil/local.mk \
+  tests/unit/libutil-support/local.mk \
+  tests/unit/libstore/local.mk
+endif
+
+ifeq ($(ENABLE_TESTS), yes)
+makefiles += \
+  tests/unit/libstore-support/local.mk \
+  tests/unit/libexpr/local.mk \
+  tests/unit/libexpr-support/local.mk \
+  tests/functional/local.mk \
+  tests/functional/ca/local.mk \
+  tests/functional/dyn-drv/local.mk \
+  tests/functional/test-libstoreconsumer/local.mk \
+  tests/functional/repl_characterization/local.mk \
+  tests/functional/plugins/local.mk
+else
+makefiles += \
+  mk/disable-tests.mk
+endif
+
+# Some makefiles require access to built programs and must be included late.
+makefiles-late =
+
+ifeq ($(ENABLE_BUILD), yes)
+makefiles-late += doc/manual/local.mk
+makefiles-late += doc/internal-api/local.mk
+endif
+
+# Miscellaneous global Flags
+
+OPTIMIZE = 1
+
+ifeq ($(OPTIMIZE), 1)
+  GLOBAL_CXXFLAGS += -O2 $(CXXLTO)
+  GLOBAL_LDFLAGS += $(CXXLTO)
+else
+  GLOBAL_CXXFLAGS += -O0 -U_FORTIFY_SOURCE
+endif
+
+include mk/lib.mk
+
+GLOBAL_CXXFLAGS += -g -Wall -Wimplicit-fallthrough -include $(buildprefix)config.h -std=c++2a -I src
--- a/Makefile.config.in
+++ b/Makefile.config.in
@ -0,0 +1,51 @@
+AR = @AR@
+BDW_GC_LIBS = @BDW_GC_LIBS@
+BOOST_LDFLAGS = @BOOST_LDFLAGS@
+BUILD_SHARED_LIBS = @BUILD_SHARED_LIBS@
+CC = @CC@
+CFLAGS = @CFLAGS@
+CXX = @CXX@
+CXXFLAGS = @CXXFLAGS@
+CXXLTO = @CXXLTO@
+EDITLINE_LIBS = @EDITLINE_LIBS@
+ENABLE_S3 = @ENABLE_S3@
+GTEST_LIBS = @GTEST_LIBS@
+HAVE_LIBCPUID = @HAVE_LIBCPUID@
+HAVE_SECCOMP = @HAVE_SECCOMP@
+HOST_OS = @host_os@
+LDFLAGS = @LDFLAGS@
+LIBARCHIVE_LIBS = @LIBARCHIVE_LIBS@
+LIBBROTLI_LIBS = @LIBBROTLI_LIBS@
+LIBCURL_LIBS = @LIBCURL_LIBS@
+LIBSECCOMP_LIBS = @LIBSECCOMP_LIBS@
+LOWDOWN_LIBS = @LOWDOWN_LIBS@
+OPENSSL_LIBS = @OPENSSL_LIBS@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+RAPIDCHECK_HEADERS = @RAPIDCHECK_HEADERS@
+SHELL = @bash@
+SODIUM_LIBS = @SODIUM_LIBS@
+SQLITE3_LIBS = @SQLITE3_LIBS@
+bash = @bash@
+bindir = @bindir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+doc_generate = @doc_generate@
+docdir = @docdir@
+embedded_sandbox_shell = @embedded_sandbox_shell@
+exec_prefix = @exec_prefix@
+includedir = @includedir@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localstatedir = @localstatedir@
+lsof = @lsof@
+mandir = @mandir@
+pkglibdir = $(libdir)/$(PACKAGE_NAME)
+prefix = @prefix@
+sandbox_shell = @sandbox_shell@
+storedir = @storedir@
+sysconfdir = @sysconfdir@
+system = @system@
+ENABLE_BUILD = @ENABLE_BUILD@
+ENABLE_TESTS = @ENABLE_TESTS@
+internal_api_docs = @internal_api_docs@
--- a/README.md
+++ b/README.md
@ -1,29 +1,36 @@
-# Lix
+# Nix

-**Lix** is an implementation of **Nix**, a powerful package management system for Linux and other Unix systems that makes package management reliable and reproducible.
+[![Open Collective supporters](https://opencollective.com/nixos/tiers/supporter/badge.svg?label=Supporters&color=brightgreen)](https://opencollective.com/nixos)
+[![Test](https://github.com/NixOS/nix/workflows/Test/badge.svg)](https://github.com/NixOS/nix/actions)

-Read more about us at https://lix.systems.
+Nix is a powerful package manager for Linux and other Unix systems that makes package
+management reliable and reproducible. Please refer to the [Nix manual](https://nixos.org/nix/manual)
+for more details.

 ## Installation

-On Linux and macOS the easiest way to install Lix is to run the following shell command
+On Linux and macOS the easiest way to install Nix is to run the following shell command
 (as a user other than root):

 ```console
-$ curl -sSf -L https://install.lix.systems/lix | sh -s -- install
+$ curl -L https://nixos.org/nix/install | sh
 ```

-For systems that **already have a Nix implementation installed**, such as NixOS systems, read our [install page](https://lix.systems/install)
+Information on additional installation methods is available on the [Nix download page](https://nixos.org/download.html).

 ## Building And Developing

-See our [Hacking guide](https://git.lix.systems/lix-project/lix/src/branch/main/doc/manual/src/contributing/hacking.md) in our manual for instruction on how to to set up a development environment and build Lix from source.
+See our [Hacking guide](https://nixos.org/manual/nix/unstable/contributing/hacking.html) in our manual for instruction on how to
+to set up a development environment and build Nix from source.

 ## Additional Resources

- [Our wiki](https://wiki.lix.systems)
- [Matrix - #space:lix.systems](https://matrix.to/#/#space:lix.systems)
+- [Nix manual](https://nixos.org/nix/manual)
+- [Nix jobsets on hydra.nixos.org](https://hydra.nixos.org/project/nix)
+- [NixOS Discourse](https://discourse.nixos.org/)
+- [Matrix - #nix:nixos.org](https://matrix.to/#/#nix:nixos.org)
+- [IRC - #nixos on libera.chat](irc://irc.libera.chat/#nixos)

 ## License

-Lix is released under [LGPL-2.1-or-later](./COPYING).
+Nix is released under the [LGPL v2.1](./COPYING).
--- a/bench/.gitignore
+++ b/bench/.gitignore
@ -1,3 +0,0 @@
-bench-*.json
-bench-*.md
-nixpkgs
--- a/bench/README.md
+++ b/bench/README.md
@ -1,91 +0,0 @@
-# Benchmarking scripts for Lix
-
-These are very much WIP, and have a few clumsy assumptions that we would
-somewhat rather be fixed, but we have committed them to let others be able to
-do benchmarking in the mean time.
-
-## Benchmarking procedure
-
-Build some Lixes you want to compare, by whichever means you wish.
-
-Get a computer that is not busy and *strongly preferably* is bare-metal or at
-least not a cloud VM (e.g. go make coffee when running benchmarks).
-
-From the root of a Lix checkout, run `./bench/bench.sh resultlink-one
-resultlink-two`, where `resultlink-one` and `resultlink-two` are the result
-links from the builds you want to test (they can be any directory with bin/nix
-in it, however).
-
-To get the summary again, run `./bench/summarize.jq bench/bench-*.json`.
-
-## Example results
-
-(vim tip: `:r !bench/summarize.jq bench/bench-*.json` to dump it directly into
-your editor)
-
-```
-result-asserts/bin/nix --extra-experimental-features 'nix-command flakes' search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6
-c6fe19ccb59cac54b5b3f25e160870 hello
-  mean:     15.993s ± 0.081s
-            user: 13.321s | system: 1.865s
-  median:   15.994s
-  range:    15.829s ... 16.096s
-  relative: 1
-result/bin/nix --extra-experimental-features 'nix-command flakes' search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6c6fe19cc
-b59cac54b5b3f25e160870 hello
-  mean:     15.897s ± 0.075s
-            user: 13.248s | system: 1.843s
-  median:   15.88s
-  range:    15.807s ... 16.047s
-  relative: 0.994
-
---
-
-result/bin/nix --extra-experimental-features 'nix-command flakes' eval -f bench/nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix
-  mean:     0.4s ± 0.024s
-            user: 0.335s | system: 0.046s
-  median:   0.386s
-  range:    0.379s ... 0.43s
-  relative: 1
-
-result-asserts/bin/nix --extra-experimental-features 'nix-command flakes' eval -f bench/nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix
-  mean:     0.404s ± 0.024s
-            user: 0.338s | system: 0.046s
-  median:   0.386s
-  range:    0.384s ... 0.436s
-  relative: 1.008
-
---
-
-result-asserts/bin/nix --extra-experimental-features 'nix-command flakes' eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'
-  mean:     5.838s ± 0.023s
-            user: 5.083s | system: 0.464s
-  median:   5.845s
-  range:    5.799s ... 5.867s
-  relative: 1
-
-result/bin/nix --extra-experimental-features 'nix-command flakes' eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'
-  mean:     5.788s ± 0.044s
-            user: 5.056s | system: 0.439s
-  median:   5.79s
-  range:    5.715s ... 5.876s
-  relative: 0.991
-
---
-
-GC_INITIAL_HEAP_SIZE=10g result-asserts/bin/nix eval --extra-experimental-features 'nix-command flakes' --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'
-  mean:     4.147s ± 0.021s
-            user: 3.457s | system: 0.487s
-  median:   4.147s
-  range:    4.123s ... 4.195s
-  relative: 1
-
-GC_INITIAL_HEAP_SIZE=10g result/bin/nix eval --extra-experimental-features 'nix-command flakes' --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'
-  mean:     4.149s ± 0.027s
-            user: 3.483s | system: 0.456s
-  median:   4.142s
-  range:    4.126s ... 4.215s
-  relative: 1
-
---
-```
--- a/bench/bench.sh
+++ b/bench/bench.sh
@ -1,62 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-shopt -s inherit_errexit
-
-scriptdir=$(cd "$(dirname -- "$0")" ; pwd -P)
-cd "$scriptdir/.."
-
-if [[ $# -lt 2 ]]; then
-    # FIXME(jade): it is a reasonable use case to want to run a benchmark run
-    # on just one build. However, since we are using hyperfine in comparison
-    # mode, we would have to combine the JSON ourselves to support that, which
-    # would probably be better done by writing a benchmarking script in
-    # not-bash.
-    echo "Fewer than two result dirs given, nothing to compare!" >&2
-    echo "Pass some directories (with names indicating which alternative they are) with bin/nix in them" >&2
-    echo "Usage: ./bench/bench.sh result-1 result-2 [result-3...]" >&2
-    exit 1
-fi
-
-_exit=""
-trap "$_exit" EXIT
-
-# XXX: yes this is very silly. flakes~!!
-nix build --impure --expr '(builtins.getFlake "git+file:.").inputs.nixpkgs.outPath' -o bench/nixpkgs
-
-export NIX_REMOTE="$(mktemp -d)"
-_exit='rm -rfv "$NIX_REMOTE"; $_exit'
-export NIX_PATH="nixpkgs=bench/nixpkgs:nixos-config=bench/configuration.nix"
-
-builds=("$@")
-
-flake_args="--extra-experimental-features 'nix-command flakes'"
-
-hyperfineArgs=(
-    --parameter-list BUILD "$(IFS=,; echo "${builds[*]}")"
-    --warmup 2 --runs 10
-)
-
-declare -A cases
-cases=(
-    [search]="{BUILD}/bin/nix $flake_args search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6c6fe19ccb59cac54b5b3f25e160870 hello"
-    [rebuild]="{BUILD}/bin/nix $flake_args eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'"
-    [rebuild-lh]="GC_INITIAL_HEAP_SIZE=10g {BUILD}/bin/nix eval $flake_args --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'"
-    [parse]="{BUILD}/bin/nix $flake_args eval -f bench/nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix"
-)
-
-benches=(
-    rebuild
-    rebuild-lh
-    search
-    parse
-)
-
-for k in "${benches[@]}"; do
-    taskset -c 2,3 \
-        chrt -f 50 \
-        hyperfine "${hyperfineArgs[@]}"  --export-json="bench/bench-${k}.json" --export-markdown="bench/bench-${k}.md" "${cases[$k]}"
-done
-
-echo "Benchmarks summary (from ./bench/summarize.jq bench/bench-*.json)"
-bench/summarize.jq bench/*.json
--- a/bench/configuration.nix
+++ b/bench/configuration.nix
@ -1,325 +0,0 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}:
-
-{
-  boot = {
-    initrd = {
-      availableKernelModules = [
-        "xhci_pci"
-        "ahci"
-      ];
-      kernelModules = [ "dm-snapshot" ];
-      luks.devices = {
-        croot = {
-          device = "/dev/sdb";
-          allowDiscards = true;
-        };
-      };
-    };
-    kernelModules = [ "kvm-intel" ];
-    kernelPackages = pkgs.linuxPackages_latest;
-
-    loader = {
-      systemd-boot.enable = true;
-      efi.canTouchEfiVariables = true;
-    };
-  };
-
-  hardware = {
-    enableRedistributableFirmware = true;
-    cpu.intel.updateMicrocode = true;
-    opengl.driSupport32Bit = true;
-    opengl.extraPackages = with pkgs; [
-      vaapiIntel
-      intel-media-driver
-      intel-compute-runtime
-    ];
-  };
-
-  fileSystems = {
-    "/" = {
-      device = "/dev/sda2";
-      fsType = "xfs";
-      options = [ "noatime" ];
-    };
-
-    "/boot" = {
-      device = "/dev/sda1";
-      fsType = "vfat";
-    };
-
-    "/nas" = {
-      device = "nas:/";
-      fsType = "nfs4";
-      options = [
-        "ro"
-        "x-systemd.automount"
-      ];
-    };
-  };
-  swapDevices = [ { device = "/dev/swap"; } ];
-
-  networking = {
-    useDHCP = false;
-    hostName = "host";
-    wireless = {
-      enable = true;
-      interfaces = [ "eth1" ];
-    };
-    interfaces = {
-      eth0.useDHCP = true;
-      eth1.useDHCP = true;
-    };
-    wg-quick.interfaces = {
-      wg0 = {
-        address = [ "2001:db8::1" ];
-        privateKeyFile = "/etc/secrets/wg0.key";
-        peers = [
-          {
-            publicKey = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
-            endpoint = "[2001:db8::2]:61021";
-            allowedIPs = [ "2001::db8:1::/64" ];
-          }
-        ];
-      };
-    };
-
-    firewall.allowedUDPPorts = [ 4567 ];
-  };
-
-  i18n = {
-    defaultLocale = "en_US.UTF-8";
-    inputMethod.enabled = "ibus";
-  };
-
-  services = {
-    xserver = {
-      enable = true;
-      layout = "us";
-      xkbVariant = "altgr-intl";
-      xkbOptions = "ctrl:nocaps";
-      libinput.enable = true;
-      wacom.enable = true;
-      videoDrivers = [ "modesetting" ];
-      modules = [ pkgs.xf86_input_wacom ];
-
-      displayManager.sx.enable = true;
-      windowManager.i3.enable = true;
-    };
-
-    udev.extraHwdb = ''
-      # not like this mattered at all
-      # we're not running udev from here
-    '';
-
-    udev.extraRules = ''
-      # ACTION=="add", SUBSYSTEM=="input", ...
-    '';
-  };
-
-  sound.enable = true;
-  hardware.pulseaudio = {
-    enable = true;
-    package = pkgs.pulseaudioFull;
-    daemon.config = {
-      lock-memory = "yes";
-      realtime-scheduling = "yes";
-      rlimit-rtprio = "-1";
-    };
-  };
-
-  programs = {
-    light.enable = true;
-    wireshark = {
-      enable = true;
-      package = pkgs.wireshark-qt;
-    };
-    gnupg.agent = {
-      enable = true;
-    };
-  };
-
-  fonts.packages = with pkgs; [
-    font-awesome
-    noto-fonts
-    noto-fonts-cjk
-    noto-fonts-emoji
-    noto-fonts-extra
-    dejavu_fonts
-    powerline-fonts
-    source-code-pro
-    cantarell-fonts
-  ];
-
-  users = {
-    mutableUsers = false;
-
-    users = {
-      user = {
-        isNormalUser = true;
-        group = "user";
-        extraGroups = [
-          "wheel"
-          "video"
-          "audio"
-          "dialout"
-          "users"
-          "kvm"
-          "wireshark"
-        ];
-        password = "unimportant";
-      };
-    };
-
-    groups = {
-      user = { };
-    };
-  };
-
-  security = {
-    pam.loginLimits = [
-      {
-        domain = "@audio";
-        item = "memlock";
-        type = "-";
-        value = "unlimited";
-      }
-      {
-        domain = "@audio";
-        item = "rtprio";
-        type = "-";
-        value = "99";
-      }
-      {
-        domain = "@audio";
-        item = "nofile";
-        type = "soft";
-        value = "99999";
-      }
-      {
-        domain = "@audio";
-        item = "nofile";
-        type = "hard";
-        value = "99999";
-      }
-    ];
-
-    sudo.extraRules = [
-      {
-        users = [ "user" ];
-        commands = [
-          {
-            command = "${pkgs.linuxPackages.cpupower}/bin/cpupower";
-            options = [ "NOPASSWD" ];
-          }
-        ];
-      }
-    ];
-  };
-
-  environment.systemPackages = with pkgs; [
-    a2jmidid
-    age
-    ardour
-    bemenu
-    blender
-    breeze-icons
-    breeze-qt5
-    bubblewrap
-    calf
-    claws-mail
-    darktable
-    duperemove
-    emacs
-    feh
-    file
-    firefox
-    fluidsynth
-    gnome3.adwaita-icon-theme
-    gnuplot
-    graphviz
-    helm
-    i3status-rust
-    inkscape
-    jack2
-    jq
-    krita
-    ldns
-    libqalculate
-    libreoffice
-    man-pages
-    nheko
-    nix-diff
-    nix-index
-    nix-output-monitor
-    open-music-kontrollers.patchmatrix
-    pamixer
-    pavucontrol
-    pciutils
-    picom
-    pwgen
-    redshift
-    ripgrep
-    rlwrap
-    silver-searcher
-    soundfont-fluid
-    whois
-    wol
-    xclip
-    xdot
-    xdotool
-    xorg.xkbcomp
-    yt-dlp
-    zathura
-    borgbackup
-    linuxPackages.cpupower
-    mtr
-    kitty
-    xf86_input_wacom
-  ];
-
-  environment.pathsToLink = [ "/share/soundfonts" ];
-
-  systemd.user.services.run-python = {
-    after = [ "network-online.target" ];
-    script = ''
-      exec ${pkgs.python3}/bin/python
-    '';
-    serviceConfig = {
-      CapabilityBoundingSet = [ "" ];
-      KeyringMode = "private";
-      LockPersonality = true;
-      MemoryDenyWriteExecute = true;
-      NoNewPrivileges = true;
-      PrivateDevices = true;
-      PrivateTmp = true;
-      PrivateUsers = true;
-      ProcSubset = "pid";
-      ProtectClock = true;
-      ProtectControlGroups = true;
-      ProtectHome = true;
-      ProtectHostname = true;
-      ProtectKernelLogs = true;
-      ProtectKernelModules = true;
-      ProtectKernelTunables = true;
-      ProtectProc = "invisible";
-      ProtectSystem = "strict";
-      RestrictAddressFamilies = "AF_INET AF_INET6";
-      RestrictNamespaces = true;
-      RestrictRealtime = true;
-      RestrictSUIDSGID = true;
-      SystemCallArchitectures = "native";
-      SystemCallFilter = [
-        "@system-service"
-        "~ @resources @privileged"
-      ];
-      UMask = "077";
-    };
-  };
-
-  system.stateVersion = "23.11";
-}
--- a/bench/summarize.jq
+++ b/bench/summarize.jq
@ -1,22 +0,0 @@
-#!/usr/bin/env -S jq -Mrf
-
-def round3:
-    . * 1000 | round | . / 1000
-    ;
-
-def stats($first):
-    [
-        "  mean:     \(.mean | round3)s ± \(.stddev | round3)s",
-        "            user: \(.user | round3)s | system: \(.system | round3)s",
-        "  median:   \(.median | round3)s",
-        "  range:    \(.min | round3)s ... \(.max | round3)s",
-        "  relative: \(.mean / $first.mean | round3)"
-    ]
-    | join("\n")
-    ;
-
-def fmt($first):
-    "\(.command)\n" + (. | stats($first))
-    ;
-
-[.results | .[0] as $first | .[] | fmt($first)] | join("\n\n") | (. + "\n\n---\n")
--- a/boehmgc-coroutine-sp-fallback.diff
+++ b/boehmgc-coroutine-sp-fallback.diff
@ -0,0 +1,99 @@
+diff --git a/darwin_stop_world.c b/darwin_stop_world.c
+index 0468aaec..b348d869 100644
+--- a/darwin_stop_world.c
+++ b/darwin_stop_world.c
+@@ -356,6 +356,7 @@ GC_INNER void GC_push_all_stacks(void)
+   int nthreads = 0;
+   word total_size = 0;
+   mach_msg_type_number_t listcount = (mach_msg_type_number_t)THREAD_TABLE_SZ;
+  size_t stack_limit;
+   if (!EXPECT(GC_thr_initialized, TRUE))
+     GC_thr_init();
+ 
+@@ -411,6 +412,19 @@ GC_INNER void GC_push_all_stacks(void)
+             GC_push_all_stack_sections(lo, hi, p->traced_stack_sect);
+           }
+           if (altstack_lo) {
+            // When a thread goes into a coroutine, we lose its original sp until
+            // control flow returns to the thread.
+            // While in the coroutine, the sp points outside the thread stack,
+            // so we can detect this and push the entire thread stack instead,
+            // as an approximation.
+            // We assume that the coroutine has similarly added its entire stack.
+            // This could be made accurate by cooperating with the application
+            // via new functions and/or callbacks.
+            stack_limit = pthread_get_stacksize_np(p->id);
+            if (altstack_lo >= altstack_hi || altstack_lo < altstack_hi - stack_limit) { // sp outside stack
+              altstack_lo = altstack_hi - stack_limit;
+            }
+
+             total_size += altstack_hi - altstack_lo;
+             GC_push_all_stack(altstack_lo, altstack_hi);
+           }
+diff --git a/include/gc.h b/include/gc.h
+index edab6c22..f2c61282 100644
+--- a/include/gc.h
+++ b/include/gc.h
+@@ -2172,6 +2172,11 @@ GC_API void GC_CALL GC_win32_free_heap(void);
+         (*GC_amiga_allocwrapper_do)(a,GC_malloc_atomic_ignore_off_page)
+ #endif /* _AMIGA && !GC_AMIGA_MAKINGLIB */
+ 
+#if !__APPLE__
+/* Patch doesn't work on apple */
+#define NIX_BOEHM_PATCH_VERSION 1
+#endif
+
+ #ifdef __cplusplus
+   } /* extern "C" */
+ #endif
+diff --git a/pthread_stop_world.c b/pthread_stop_world.c
+index b5d71e62..aed7b0bf 100644
+--- a/pthread_stop_world.c
+++ b/pthread_stop_world.c
+@@ -768,6 +768,8 @@ STATIC void GC_restart_handler(int sig)
+ /* world is stopped.  Should not fail if it isn't.                      */
+ GC_INNER void GC_push_all_stacks(void)
+ {
+    size_t stack_limit;
+    pthread_attr_t pattr;
+     GC_bool found_me = FALSE;
+     size_t nthreads = 0;
+     int i;
+@@ -851,6 +853,37 @@ GC_INNER void GC_push_all_stacks(void)
+           hi = p->altstack + p->altstack_size;
+           /* FIXME: Need to scan the normal stack too, but how ? */
+           /* FIXME: Assume stack grows down */
+        } else {
+#ifdef HAVE_PTHREAD_ATTR_GET_NP
+          if (!pthread_attr_init(&pattr)
+              || !pthread_attr_get_np(p->id, &pattr))
+#else /* HAVE_PTHREAD_GETATTR_NP */
+          if (pthread_getattr_np(p->id, &pattr))
+#endif
+          {
+            ABORT("GC_push_all_stacks: pthread_getattr_np failed!");
+          }
+          if (pthread_attr_getstacksize(&pattr, &stack_limit)) {
+            ABORT("GC_push_all_stacks: pthread_attr_getstacksize failed!");
+          }
+          if (pthread_attr_destroy(&pattr)) {
+            ABORT("GC_push_all_stacks: pthread_attr_destroy failed!");
+          }
+          // When a thread goes into a coroutine, we lose its original sp until
+          // control flow returns to the thread.
+          // While in the coroutine, the sp points outside the thread stack,
+          // so we can detect this and push the entire thread stack instead,
+          // as an approximation.
+          // We assume that the coroutine has similarly added its entire stack.
+          // This could be made accurate by cooperating with the application
+          // via new functions and/or callbacks.
+          #ifndef STACK_GROWS_UP
+            if (lo >= hi || lo < hi - stack_limit) { // sp outside stack
+              lo = hi - stack_limit;
+            }
+          #else
+          #error "STACK_GROWS_UP not supported in boost_coroutine2 (as of june 2021), so we don't support it in Nix."
+          #endif
+         }
+         GC_push_all_stack_sections(lo, hi, traced_stack_sect);
+ #       ifdef STACK_GROWS_UP
--- a/boehmgc-traceable_allocator-public.diff
+++ b/boehmgc-traceable_allocator-public.diff
@ -0,0 +1,12 @@
+diff --git a/include/gc_allocator.h b/include/gc_allocator.h
+index 597c7f13..587286be 100644
+--- a/include/gc_allocator.h
+++ b/include/gc_allocator.h
+@@ -312,6 +312,7 @@ public:
+ 
+ template<>
+ class traceable_allocator<void> {
+public:
+   typedef size_t      size_type;
+   typedef ptrdiff_t   difference_type;
+   typedef void*       pointer;
--- a/config/config.guess
+++ b/config/config.guess
--- a/config/config.sub
+++ b/config/config.sub
--- a/config/install-sh
+++ b/config/install-sh
@ -0,0 +1,527 @@
+#!/bin/sh
+# install - install a program, script, or datafile
+
+scriptversion=2011-11-20.07; # UTC
+
+# This originates from X11R5 (mit/util/scripts/install.sh), which was
+# later released in X11R6 (xc/config/util/install.sh) with the
+# following copyright and license.
+#
+# Copyright (C) 1994 X Consortium
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
+# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name of the X Consortium shall not
+# be used in advertising or otherwise to promote the sale, use or other deal-
+# ings in this Software without prior written authorization from the X Consor-
+# tium.
+#
+#
+# FSF changes to this file are in the public domain.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# 'make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+
+nl='
+'
+IFS=" ""	$nl"
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit=${DOITPROG-}
+if test -z "$doit"; then
+  doit_exec=exec
+else
+  doit_exec=$doit
+fi
+
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.
+
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
+
+posix_glob='?'
+initialize_posix_glob='
+  test "$posix_glob" != "?" || {
+    if (set -f) 2>/dev/null; then
+      posix_glob=
+    else
+      posix_glob=:
+    fi
+  }
+'
+
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+chgrpcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
+rmcmd="$rmprog -f"
+stripcmd=
+
+src=
+dst=
+dir_arg=
+dst_arg=
+
+copy_on_change=false
+no_target_directory=
+
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+   or: $0 [OPTION]... SRCFILES... DIRECTORY
+   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
+   or: $0 [OPTION]... -d DIRECTORIES...
+
+In the 1st form, copy SRCFILE to DSTFILE.
+In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
+In the 4th, create DIRECTORIES.
+
+Options:
+     --help     display this help and exit.
+     --version  display version info and exit.
+
+  -c            (ignored)
+  -C            install only if different (preserve the last data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -s            $stripprog installed files.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.
+
+Environment variables override the default commands:
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+"
+
+while test $# -ne 0; do
+  case $1 in
+    -c) ;;
+
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;
+
+    -g) chgrpcmd="$chgrpprog $2"
+	shift;;
+
+    --help) echo "$usage"; exit $?;;
+
+    -m) mode=$2
+	case $mode in
+	  *' '* | *'	'* | *'
+'*	  | *'*'* | *'?'* | *'['*)
+	    echo "$0: invalid mode: $mode" >&2
+	    exit 1;;
+	esac
+	shift;;
+
+    -o) chowncmd="$chownprog $2"
+	shift;;
+
+    -s) stripcmd=$stripprog;;
+
+    -t) dst_arg=$2
+	# Protect names problematic for 'test' and other utilities.
+	case $dst_arg in
+	  -* | [=\(\)!]) dst_arg=./$dst_arg;;
+	esac
+	shift;;
+
+    -T) no_target_directory=true;;
+
+    --version) echo "$0 $scriptversion"; exit $?;;
+
+    --)	shift
+	break;;
+
+    -*)	echo "$0: invalid option: $1" >&2
+	exit 1;;
+
+    *)  break;;
+  esac
+  shift
+done
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+    # Protect names problematic for 'test' and other utilities.
+    case $dst_arg in
+      -* | [=\(\)!]) dst_arg=./$dst_arg;;
+    esac
+  done
+fi
+
+if test $# -eq 0; then
+  if test -z "$dir_arg"; then
+    echo "$0: no input file specified." >&2
+    exit 1
+  fi
+  # It's OK to call 'install-sh -d' without argument.
+  # This can happen when creating conditional directories.
+  exit 0
+fi
+
+if test -z "$dir_arg"; then
+  do_exit='(exit $ret); exit $ret'
+  trap "ret=129; $do_exit" 1
+  trap "ret=130; $do_exit" 2
+  trap "ret=141; $do_exit" 13
+  trap "ret=143; $do_exit" 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+	u_plus_rw=
+      else
+	u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+	u_plus_rw=
+      else
+	u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
+for src
+do
+  # Protect names problematic for 'test' and other utilities.
+  case $src in
+    -* | [=\(\)!]) src=./$src;;
+  esac
+
+  if test -n "$dir_arg"; then
+    dst=$src
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+  else
+
+    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
+    # might cause directories to be created, which would be especially bad
+    # if $src (and thus $dsttmp) contains '*'.
+    if test ! -f "$src" && test ! -d "$src"; then
+      echo "$0: $src does not exist." >&2
+      exit 1
+    fi
+
+    if test -z "$dst_arg"; then
+      echo "$0: no destination specified." >&2
+      exit 1
+    fi
+    dst=$dst_arg
+
+    # If destination is a directory, append the input filename; won't work
+    # if double slashes aren't ignored.
+    if test -d "$dst"; then
+      if test -n "$no_target_directory"; then
+	echo "$0: $dst_arg: Is a directory" >&2
+	exit 1
+      fi
+      dstdir=$dst
+      dst=$dstdir/`basename "$src"`
+      dstdir_status=0
+    else
+      # Prefer dirname, but fall back on a substitute if dirname fails.
+      dstdir=`
+	(dirname "$dst") 2>/dev/null ||
+	expr X"$dst" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	     X"$dst" : 'X\(//\)[^/]' \| \
+	     X"$dst" : 'X\(//\)$' \| \
+	     X"$dst" : 'X\(/\)' \| . 2>/dev/null ||
+	echo X"$dst" |
+	    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\/\)[^/].*/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\/\)$/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\).*/{
+		   s//\1/
+		   q
+		 }
+		 s/.*/./; q'
+      `
+
+      test -d "$dstdir"
+      dstdir_status=$?
+    fi
+  fi
+
+  obsolete_mkdir_used=false
+
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+	# Create intermediate dirs using mode 755 as modified by the umask.
+	# This is like FreeBSD 'install' as of 1997-10-28.
+	umask=`umask`
+	case $stripcmd.$umask in
+	  # Optimize common cases.
+	  *[2367][2367]) mkdir_umask=$umask;;
+	  .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;
+
+	  *[0-7])
+	    mkdir_umask=`expr $umask + 22 \
+	      - $umask % 100 % 40 + $umask % 20 \
+	      - $umask % 10 % 4 + $umask % 2
+	    `;;
+	  *) mkdir_umask=$umask,go-w;;
+	esac
+
+	# With -d, create the new directory with the user-specified mode.
+	# Otherwise, rely on $mkdir_umask.
+	if test -n "$dir_arg"; then
+	  mkdir_mode=-m$mode
+	else
+	  mkdir_mode=
+	fi
+
+	posix_mkdir=false
+	case $umask in
+	  *[123567][0-7][0-7])
+	    # POSIX mkdir -p sets u+wx bits regardless of umask, which
+	    # is incompatible with FreeBSD 'install' when (umask & 300) != 0.
+	    ;;
+	  *)
+	    tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+	    trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0
+
+	    if (umask $mkdir_umask &&
+		exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1
+	    then
+	      if test -z "$dir_arg" || {
+		   # Check for POSIX incompatibilities with -m.
+		   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+		   # other-writable bit of parent directory when it shouldn't.
+		   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+		   ls_ld_tmpdir=`ls -ld "$tmpdir"`
+		   case $ls_ld_tmpdir in
+		     d????-?r-*) different_mode=700;;
+		     d????-?--*) different_mode=755;;
+		     *) false;;
+		   esac &&
+		   $mkdirprog -m$different_mode -p -- "$tmpdir" && {
+		     ls_ld_tmpdir_1=`ls -ld "$tmpdir"`
+		     test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+		   }
+		 }
+	      then posix_mkdir=:
+	      fi
+	      rmdir "$tmpdir/d" "$tmpdir"
+	    else
+	      # Remove any dirs left behind by ancient mkdir implementations.
+	      rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null
+	    fi
+	    trap '' 0;;
+	esac;;
+    esac
+
+    if
+      $posix_mkdir && (
+	umask $mkdir_umask &&
+	$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # The umask is ridiculous, or mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+	/*) prefix='/';;
+	[-=\(\)!]*) prefix='./';;
+	*)  prefix='';;
+      esac
+
+      eval "$initialize_posix_glob"
+
+      oIFS=$IFS
+      IFS=/
+      $posix_glob set -f
+      set fnord $dstdir
+      shift
+      $posix_glob set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+	test X"$d" = X && continue
+
+	prefix=$prefix$d
+	if test -d "$prefix"; then
+	  prefixes=
+	else
+	  if $posix_mkdir; then
+	    (umask=$mkdir_umask &&
+	     $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+	    # Don't fail if two instances are running concurrently.
+	    test -d "$prefix" || exit 1
+	  else
+	    case $prefix in
+	      *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+	      *) qprefix=$prefix;;
+	    esac
+	    prefixes="$prefixes '$qprefix'"
+	  fi
+	fi
+	prefix=$prefix/
+      done
+
+      if test -n "$prefixes"; then
+	# Don't fail if two instances are running concurrently.
+	(umask $mkdir_umask &&
+	 eval "\$doit_exec \$mkdirprog $prefixes") ||
+	  test -d "$dstdir" || exit 1
+	obsolete_mkdir_used=true
+      fi
+    fi
+  fi
+
+  if test -n "$dir_arg"; then
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
+  else
+
+    # Make a couple of temp file names in the proper directory.
+    dsttmp=$dstdir/_inst.$$_
+    rmtmp=$dstdir/_rm.$$_
+
+    # Trap to clean up those temp files at exit.
+    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
+
+    # Copy the file name to the temp name.
+    (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&
+
+    # and set any options; do chmod last to preserve setuid bits.
+    #
+    # If any of these fail, we abort the whole thing.  If we want to
+    # ignore errors from any of these, just make sure not to ignore
+    # errors from the above "$doit $cpprog $src $dsttmp" command.
+    #
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
+
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"	2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"	2>/dev/null` &&
+
+       eval "$initialize_posix_glob" &&
+       $posix_glob set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       $posix_glob set +f &&
+
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
+
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+	# Now remove or move aside any old file at destination location.
+	# We try this two ways since rm can't unlink itself on some
+	# systems and the destination file might be busy for other
+	# reasons.  In this case, the final cleanup might fail but the new
+	# file should still install successfully.
+	{
+	  test ! -f "$dst" ||
+	  $doit $rmcmd -f "$dst" 2>/dev/null ||
+	  { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+	    { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
+	  } ||
+	  { echo "$0: cannot unlink or rename $dst" >&2
+	    (exit 1); exit 1
+	  }
+	} &&
+
+	# Now rename the file to the real destination.
+	$doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
+done
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:
--- a/configure.ac
+++ b/configure.ac
@ -0,0 +1,389 @@
+AC_INIT([nix],[m4_esyscmd(bash -c "echo -n $(cat ./.version)$VERSION_SUFFIX")])
+AC_CONFIG_MACRO_DIRS([m4])
+AC_CONFIG_SRCDIR(README.md)
+AC_CONFIG_AUX_DIR(config)
+
+AC_PROG_SED
+
+# Construct a Nix system name (like "i686-linux"):
+# https://www.gnu.org/software/autoconf/manual/html_node/Canonicalizing.html#index-AC_005fCANONICAL_005fHOST-1
+# The inital value is produced by the `config/config.guess` script:
+# upstream: https://git.savannah.gnu.org/cgit/config.git/tree/config.guess
+# It has the following form, which is not documented anywhere:
+# <cpu>-<vendor>-<os>[<version>][-<abi>]
+# If `./configure` is passed any of the `--host`, `--build`, `--target` options, the value comes from `config/config.sub` instead:
+# upstream: https://git.savannah.gnu.org/cgit/config.git/tree/config.sub
+AC_CANONICAL_HOST
+AC_MSG_CHECKING([for the canonical Nix system name])
+
+AC_ARG_WITH(system, AS_HELP_STRING([--with-system=SYSTEM],[Platform identifier (e.g., `i686-linux').]),
+  [system=$withval],
+  [case "$host_cpu" in
+     i*86)
+        machine_name="i686";;
+     amd64)
+        machine_name="x86_64";;
+     armv6|armv7)
+        machine_name="${host_cpu}l";;
+     *)
+        machine_name="$host_cpu";;
+   esac
+
+   case "$host_os" in
+     linux-gnu*|linux-musl*)
+        # For backward compatibility, strip the `-gnu' part.
+        system="$machine_name-linux";;
+     *)
+        # Strip the version number from names such as `gnu0.3',
+        # `darwin10.2.0', etc.
+        system="$machine_name-`echo $host_os | "$SED" -e's/@<:@0-9.@:>@*$//g'`";;
+   esac])
+
+AC_MSG_RESULT($system)
+AC_SUBST(system)
+AC_DEFINE_UNQUOTED(SYSTEM, ["$system"], [platform identifier ('cpu-os')])
+
+
+# State should be stored in /nix/var, unless the user overrides it explicitly.
+test "$localstatedir" = '${prefix}/var' && localstatedir=/nix/var
+
+# Assign a default value to C{,XX}FLAGS as the default configure script sets them
+# to -O2 otherwise, which we don't want to have hardcoded
+CFLAGS=${CFLAGS-""}
+CXXFLAGS=${CXXFLAGS-""}
+
+AC_PROG_CC
+AC_PROG_CXX
+AC_PROG_CPP
+
+AC_CHECK_TOOL([AR], [ar])
+
+# Use 64-bit file system calls so that we can support files > 2 GiB.
+AC_SYS_LARGEFILE
+
+
+# Solaris-specific stuff.
+AC_STRUCT_DIRENT_D_TYPE
+case "$host_os" in
+  solaris*)
+    # Solaris requires -lsocket -lnsl for network functions
+    LDFLAGS="-lsocket -lnsl $LDFLAGS"
+    ;;
+esac
+
+
+ENSURE_NO_GCC_BUG_80431
+
+
+# Check for pubsetbuf.
+AC_MSG_CHECKING([for pubsetbuf])
+AC_LANG_PUSH(C++)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <iostream>
+using namespace std;
+static char buf[1024];]],
+    [[cerr.rdbuf()->pubsetbuf(buf, sizeof(buf));]])],
+    [AC_MSG_RESULT(yes) AC_DEFINE(HAVE_PUBSETBUF, 1, [Whether pubsetbuf is available.])],
+    AC_MSG_RESULT(no))
+AC_LANG_POP(C++)
+
+
+AC_CHECK_FUNCS([statvfs pipe2])
+
+
+# Check for lutimes, optionally used for changing the mtime of
+# symlinks.
+AC_CHECK_FUNCS([lutimes])
+
+
+# Check whether the store optimiser can optimise symlinks.
+AC_MSG_CHECKING([whether it is possible to create a link to a symlink])
+ln -s bla tmp_link
+if ln tmp_link tmp_link2 2> /dev/null; then
+    AC_MSG_RESULT(yes)
+    AC_DEFINE(CAN_LINK_SYMLINK, 1, [Whether link() works on symlinks.])
+else
+    AC_MSG_RESULT(no)
+fi
+rm -f tmp_link tmp_link2
+
+
+# Check for <locale>.
+AC_LANG_PUSH(C++)
+AC_CHECK_HEADERS([locale])
+AC_LANG_POP(C++)
+
+
+AC_DEFUN([NEED_PROG],
+[
+AC_PATH_PROG($1, $2)
+if test -z "$$1"; then
+    AC_MSG_ERROR([$2 is required])
+fi
+])
+
+NEED_PROG(bash, bash)
+AC_PATH_PROG(flex, flex, false)
+AC_PATH_PROG(bison, bison, false)
+AC_PATH_PROG(dot, dot)
+AC_PATH_PROG(lsof, lsof, lsof)
+NEED_PROG(jq, jq)
+
+
+AC_SUBST(coreutils, [$(dirname $(type -p cat))])
+
+
+AC_ARG_WITH(store-dir, AS_HELP_STRING([--with-store-dir=PATH],[path of the Nix store (defaults to /nix/store)]),
+  storedir=$withval, storedir='/nix/store')
+AC_SUBST(storedir)
+
+
+# Look for boost, a required dependency.
+# Note that AX_BOOST_BASE only exports *CPP* BOOST_CPPFLAGS, no CXX flags,
+# and CPPFLAGS are not passed to the C++ compiler automatically.
+# Thus we append the returned CPPFLAGS to the CXXFLAGS here.
+AX_BOOST_BASE([1.66], [CXXFLAGS="$BOOST_CPPFLAGS $CXXFLAGS"], [AC_MSG_ERROR([Nix requires boost.])])
+# For unknown reasons, setting this directly in the ACTION-IF-FOUND above
+# ends up with LDFLAGS being empty, so we set it afterwards.
+LDFLAGS="$BOOST_LDFLAGS $LDFLAGS"
+
+# On some platforms, new-style atomics need a helper library
+AC_MSG_CHECKING(whether -latomic is needed)
+AC_LINK_IFELSE([AC_LANG_SOURCE([[
+#include <stdint.h>
+uint64_t v;
+int main() {
+    return (int)__atomic_load_n(&v, __ATOMIC_ACQUIRE);
+}]])], GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC=no, GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC=yes)
+AC_MSG_RESULT($GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC)
+if test "x$GCC_ATOMIC_BUILTINS_NEED_LIBATOMIC" = xyes; then
+    LDFLAGS="-latomic $LDFLAGS"
+fi
+
+# Running the functional tests without building Nix is useful for testing
+# different pre-built versions of Nix against each other.
+AC_ARG_ENABLE(build, AS_HELP_STRING([--disable-build],[Do not build nix]),
+  ENABLE_BUILD=$enableval, ENABLE_BUILD=yes)
+AC_SUBST(ENABLE_BUILD)
+# Building without tests is useful for bootstrapping with a smaller footprint
+# or running the tests in a separate derivation. Otherwise, we do compile and
+# run them.
+AC_ARG_ENABLE(tests, AS_HELP_STRING([--disable-tests],[Do not build the tests]),
+  ENABLE_TESTS=$enableval, ENABLE_TESTS=yes)
+AC_SUBST(ENABLE_TESTS)
+
+# Building without API docs is the default as Nix' C++ interfaces are internal and unstable.
+AC_ARG_ENABLE(internal_api_docs, AS_HELP_STRING([--enable-internal-api-docs],[Build API docs for Nix's internal unstable C++ interfaces]),
+  internal_api_docs=$enableval, internal_api_docs=no)
+AC_SUBST(internal_api_docs)
+
+# LTO is currently broken with clang for unknown reasons; ld segfaults in the llvm plugin
+AC_ARG_ENABLE(lto, AS_HELP_STRING([--enable-lto],[Enable LTO (only supported with GCC) [default=no]]),
+  lto=$enableval, lto=no)
+if test "$lto" = yes; then
+    if $CXX --version | grep -q GCC; then
+        AC_SUBST(CXXLTO, [-flto=jobserver])
+    else
+        echo "error: LTO is only supported with GCC at the moment" >&2
+        exit 1
+    fi
+else
+    AC_SUBST(CXXLTO, [""])
+fi
+
+PKG_PROG_PKG_CONFIG
+
+AC_ARG_ENABLE(shared, AS_HELP_STRING([--enable-shared],[Build shared libraries for Nix [default=yes]]),
+  shared=$enableval, shared=yes)
+if test "$shared" = yes; then
+  AC_SUBST(BUILD_SHARED_LIBS, 1, [Whether to build shared libraries.])
+else
+  AC_SUBST(BUILD_SHARED_LIBS, 0, [Whether to build shared libraries.])
+  PKG_CONFIG="$PKG_CONFIG --static"
+fi
+
+# Look for OpenSSL, a required dependency. FIXME: this is only (maybe)
+# used by S3BinaryCacheStore.
+PKG_CHECK_MODULES([OPENSSL], [libcrypto >= 1.1.1], [CXXFLAGS="$OPENSSL_CFLAGS $CXXFLAGS"])
+
+
+# Look for libarchive.
+PKG_CHECK_MODULES([LIBARCHIVE], [libarchive >= 3.1.2], [CXXFLAGS="$LIBARCHIVE_CFLAGS $CXXFLAGS"])
+# Workaround until https://github.com/libarchive/libarchive/issues/1446 is fixed
+if test "$shared" != yes; then
+    LIBARCHIVE_LIBS+=' -lz'
+fi
+
+# Look for SQLite, a required dependency.
+PKG_CHECK_MODULES([SQLITE3], [sqlite3 >= 3.6.19], [CXXFLAGS="$SQLITE3_CFLAGS $CXXFLAGS"])
+
+# Look for libcurl, a required dependency.
+PKG_CHECK_MODULES([LIBCURL], [libcurl], [CXXFLAGS="$LIBCURL_CFLAGS $CXXFLAGS"])
+
+# Look for editline, a required dependency.
+# The the libeditline.pc file was added only in libeditline >= 1.15.2,
+# see https://github.com/troglobit/editline/commit/0a8f2ef4203c3a4a4726b9dd1336869cd0da8607,
+# but e.g. Ubuntu 16.04 has an older version, so we fall back to searching for
+# editline.h when the pkg-config approach fails.
+PKG_CHECK_MODULES([EDITLINE], [libeditline], [CXXFLAGS="$EDITLINE_CFLAGS $CXXFLAGS"], [
+  AC_CHECK_HEADERS([editline.h], [true],
+    [AC_MSG_ERROR([Nix requires libeditline; it was found neither via pkg-config nor its normal header.])])
+  AC_SEARCH_LIBS([readline read_history], [editline], [],
+    [AC_MSG_ERROR([Nix requires libeditline; it was not found via pkg-config, but via its header, but required functions do not work. Maybe it is too old? >= 1.14 is required.])])
+])
+
+# Look for libsodium.
+PKG_CHECK_MODULES([SODIUM], [libsodium], [CXXFLAGS="$SODIUM_CFLAGS $CXXFLAGS"])
+
+# Look for libbrotli{enc,dec}.
+PKG_CHECK_MODULES([LIBBROTLI], [libbrotlienc libbrotlidec], [CXXFLAGS="$LIBBROTLI_CFLAGS $CXXFLAGS"])
+
+# Look for libcpuid.
+have_libcpuid=
+if test "$machine_name" = "x86_64"; then
+    AC_ARG_ENABLE([cpuid],
+                  AS_HELP_STRING([--disable-cpuid], [Do not determine microarchitecture levels with libcpuid (relevant to x86_64 only)]))
+    if test "x$enable_cpuid" != "xno"; then
+      PKG_CHECK_MODULES([LIBCPUID], [libcpuid],
+        [CXXFLAGS="$LIBCPUID_CFLAGS $CXXFLAGS"
+         have_libcpuid=1
+         AC_DEFINE([HAVE_LIBCPUID], [1], [Use libcpuid])]
+      )
+    fi
+fi
+AC_SUBST(HAVE_LIBCPUID, [$have_libcpuid])
+
+
+# Look for libseccomp, required for Linux sandboxing.
+case "$host_os" in
+  linux*)
+    AC_ARG_ENABLE([seccomp-sandboxing],
+                  AS_HELP_STRING([--disable-seccomp-sandboxing],[Don't build support for seccomp sandboxing (only recommended if your arch doesn't support libseccomp yet!)
+                                ]))
+    if test "x$enable_seccomp_sandboxing" != "xno"; then
+      PKG_CHECK_MODULES([LIBSECCOMP], [libseccomp],
+                        [CXXFLAGS="$LIBSECCOMP_CFLAGS $CXXFLAGS"])
+      have_seccomp=1
+      AC_DEFINE([HAVE_SECCOMP], [1], [Whether seccomp is available and should be used for sandboxing.])
+    else
+      have_seccomp=
+    fi
+    ;;
+  *)
+    have_seccomp=
+    ;;
+esac
+AC_SUBST(HAVE_SECCOMP, [$have_seccomp])
+
+
+# Look for aws-cpp-sdk-s3.
+AC_LANG_PUSH(C++)
+AC_CHECK_HEADERS([aws/s3/S3Client.h],
+  [AC_DEFINE([ENABLE_S3], [1], [Whether to enable S3 support via aws-sdk-cpp.]) enable_s3=1],
+  [AC_DEFINE([ENABLE_S3], [0], [Whether to enable S3 support via aws-sdk-cpp.]) enable_s3=])
+AC_SUBST(ENABLE_S3, [$enable_s3])
+AC_LANG_POP(C++)
+
+if test -n "$enable_s3"; then
+  declare -a aws_version_tokens=($(printf '#include <aws/core/VersionConfig.h>\nAWS_SDK_VERSION_STRING' | $CPP $CPPFLAGS - | grep -v '^#.*' | sed 's/"//g' | tr '.' ' '))
+  AC_DEFINE_UNQUOTED([AWS_VERSION_MAJOR], ${aws_version_tokens@<:@0@:>@}, [Major version of aws-sdk-cpp.])
+  AC_DEFINE_UNQUOTED([AWS_VERSION_MINOR], ${aws_version_tokens@<:@1@:>@}, [Minor version of aws-sdk-cpp.])
+  AC_DEFINE_UNQUOTED([AWS_VERSION_PATCH], ${aws_version_tokens@<:@2@:>@}, [Patch version of aws-sdk-cpp.])
+fi
+
+
+# Whether to use the Boehm garbage collector.
+AC_ARG_ENABLE(gc, AS_HELP_STRING([--enable-gc],[enable garbage collection in the Nix expression evaluator (requires Boehm GC) [default=yes]]),
+  gc=$enableval, gc=yes)
+if test "$gc" = yes; then
+  PKG_CHECK_MODULES([BDW_GC], [bdw-gc])
+  CXXFLAGS="$BDW_GC_CFLAGS $CXXFLAGS"
+  AC_DEFINE(HAVE_BOEHMGC, 1, [Whether to use the Boehm garbage collector.])
+fi
+
+
+if test "$ENABLE_TESTS" = yes; then
+
+# Look for gtest.
+PKG_CHECK_MODULES([GTEST], [gtest_main gmock_main])
+
+
+# Look for rapidcheck.
+AC_ARG_VAR([RAPIDCHECK_HEADERS], [include path of gtest headers shipped by RAPIDCHECK])
+# No pkg-config yet, https://github.com/emil-e/rapidcheck/issues/302
+AC_LANG_PUSH(C++)
+AC_SUBST(RAPIDCHECK_HEADERS)
+[CXXFLAGS="-I $RAPIDCHECK_HEADERS $CXXFLAGS"]
+[LIBS="-lrapidcheck -lgtest $LIBS"]
+AC_CHECK_HEADERS([rapidcheck/gtest.h], [], [], [#include <gtest/gtest.h>])
+dnl AC_CHECK_LIB doesn't work for C++ libs with mangled symbols
+AC_LINK_IFELSE([
+    AC_LANG_PROGRAM([[
+      #include <gtest/gtest.h>
+      #include <rapidcheck/gtest.h>
+    ]], [[
+      return RUN_ALL_TESTS();
+    ]])
+  ],
+  [],
+  [AC_MSG_ERROR([librapidcheck is not found.])])
+AC_LANG_POP(C++)
+
+fi
+
+# Look for nlohmann/json.
+PKG_CHECK_MODULES([NLOHMANN_JSON], [nlohmann_json >= 3.9])
+
+
+# documentation generation switch
+AC_ARG_ENABLE(doc-gen, AS_HELP_STRING([--disable-doc-gen],[disable documentation generation]),
+  doc_generate=$enableval, doc_generate=yes)
+AC_SUBST(doc_generate)
+
+# Look for lowdown library.
+PKG_CHECK_MODULES([LOWDOWN], [lowdown >= 0.9.0], [CXXFLAGS="$LOWDOWN_CFLAGS $CXXFLAGS"])
+
+# Setuid installations.
+AC_CHECK_FUNCS([setresuid setreuid lchown])
+
+
+# Nice to have, but not essential.
+AC_CHECK_FUNCS([strsignal posix_fallocate sysconf])
+
+
+AC_ARG_WITH(sandbox-shell, AS_HELP_STRING([--with-sandbox-shell=PATH],[path of a statically-linked shell to use as /bin/sh in sandboxes]),
+  sandbox_shell=$withval)
+AC_SUBST(sandbox_shell)
+if test ${cross_compiling:-no} = no && ! test -z ${sandbox_shell+x}; then
+  AC_MSG_CHECKING([whether sandbox-shell has the standalone feature])
+  # busybox shell sometimes allows executing other busybox applets,
+  # even if they are not in the path, breaking our sandbox
+  if PATH= $sandbox_shell -c "busybox" 2>&1 | grep -qv "not found"; then
+    AC_MSG_RESULT(enabled)
+    AC_MSG_ERROR([Please disable busybox FEATURE_SH_STANDALONE])
+  else
+    AC_MSG_RESULT(disabled)
+  fi
+fi
+
+AC_ARG_ENABLE(embedded-sandbox-shell, AS_HELP_STRING([--enable-embedded-sandbox-shell],[include the sandbox shell in the Nix binary [default=no]]),
+  embedded_sandbox_shell=$enableval, embedded_sandbox_shell=no)
+AC_SUBST(embedded_sandbox_shell)
+if test "$embedded_sandbox_shell" = yes; then
+  AC_DEFINE(HAVE_EMBEDDED_SANDBOX_SHELL, 1, [Include the sandbox shell in the Nix binary.])
+fi
+
+
+# Expand all variables in config.status.
+test "$prefix" = NONE && prefix=$ac_default_prefix
+test "$exec_prefix" = NONE && exec_prefix='${prefix}'
+for name in $ac_subst_vars; do
+    declare $name="$(eval echo "${!name}")"
+    declare $name="$(eval echo "${!name}")"
+    declare $name="$(eval echo "${!name}")"
+done
+
+rm -f Makefile.config
+
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_FILES([])
+AC_OUTPUT
--- a/default.nix
+++ b/default.nix
@ -1,9 +1,10 @@
-(import (
-  let
-    lock = builtins.fromJSON (builtins.readFile ./flake.lock);
-  in
-  fetchTarball {
-    url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
-    sha256 = lock.nodes.flake-compat.locked.narHash;
-  }
-) { src = ./.; }).defaultNix
+(import
+  (
+    let lock = builtins.fromJSON (builtins.readFile ./flake.lock); in
+    fetchTarball {
+      url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+      sha256 = lock.nodes.flake-compat.locked.narHash;
+    }
+  )
+  { src = ./.; }
+).defaultNix
--- a/doc/internal-api/doxygen.cfg.in
+++ b/doc/internal-api/doxygen.cfg.in
@ -14,13 +14,11 @@ PROJECT_NAME           = "Nix"

 PROJECT_NUMBER         = @PACKAGE_VERSION@

-OUTPUT_DIRECTORY       = @docdir@
-
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
 # quick idea about the purpose of the project. Keep the description short.

-PROJECT_BRIEF          = "Lix: A modern, delicious implementation of the Nix package manager; unstable internal interfaces"
+PROJECT_BRIEF          = "Nix, the purely functional package manager; unstable internal interfaces"

 # If the GENERATE_LATEX tag is set to YES, doxygen will generate LaTeX output.
 # The default value is: YES.
--- a/doc/internal-api/local.mk
+++ b/doc/internal-api/local.mk
@ -0,0 +1,19 @@
+.PHONY: internal-api-html
+
+ifeq ($(internal_api_docs), yes)
+
+$(docdir)/internal-api/html/index.html $(docdir)/internal-api/latex: $(d)/doxygen.cfg
+	mkdir -p $(docdir)/internal-api
+	{ cat $< ; echo "OUTPUT_DIRECTORY=$(docdir)/internal-api" ; } | doxygen -
+
+# Generate the HTML API docs for Nix's unstable internal interfaces.
+internal-api-html: $(docdir)/internal-api/html/index.html
+
+else
+
+# Make a nicer error message
+internal-api-html:
+	@echo "Internal API docs are disabled. Configure with '--enable-internal-api-docs', or avoid calling 'make internal-api-html'."
+	@exit 1
+
+endif
--- a/doc/internal-api/meson.build
+++ b/doc/internal-api/meson.build
@ -1,34 +0,0 @@
-doxygen_cfg = configure_file(
-  input : 'doxygen.cfg.in',
-  output : 'doxygen.cfg',
-  configuration : {
-    'PACKAGE_VERSION': meson.project_version(),
-    'RAPIDCHECK_HEADERS': rapidcheck_meson.get_variable('includedir'),
-    'docdir' : meson.current_build_dir(),
-  },
-)
-
-internal_api_docs = custom_target(
-  'internal-api-docs',
-  command : [
-    bash,
-    # Meson can you please just give us a `workdir` argument to custom targets...
-    '-c',
-    # We have to prefix the doxygen_cfg path with the project build root
-    # because of the cd in front.
-    'cd @0@ && @1@ @2@/@INPUT0@'.format(
-      meson.project_source_root(),
-      doxygen.full_path(),
-      meson.project_build_root(),
-    ),
-  ],
-  input : [
-    doxygen_cfg,
-  ],
-  output : 'html',
-  install : true,
-  install_dir : datadir / 'doc/nix/internal-api',
-  build_always_stale : true,
-)
-
-alias_target('internal-api-html', internal_api_docs)
--- a/doc/manual/anchors.jq
+++ b/doc/manual/anchors.jq
--- a/doc/manual/book.toml
+++ b/doc/manual/book.toml
@ -1,37 +1,16 @@
 [book]
-title = "Lix Reference Manual"
-
-[build]
-create-missing = false
+title = "Nix Reference Manual"

 [output.html]
 additional-css = ["custom.css"]
 additional-js = ["redirects.js"]
-# Using our GitHub mirror enables easier typo fixes since there is no easy way
-# to just submit a Gerrit CL by the web for trivial stuff.
-edit-url-template = "https://github.com/lix-project/lix/tree/main/doc/manual/{path}"
-git-repository-url = "https://git.lix.systems/lix-project/lix"
-# Folding by default would prevent things like "Ctrl+F for nix-env" from working
-# trivially, but the user should be able to fold if they want to.
-fold.enable = true
-fold.level = 30
-
-# Handles replacing @docroot@ with a path to ./src relative to that markdown file,
-# {{#include handlebars}}, and the @generated@ syntax used within these. it mostly
-# but not entirely replaces the links preprocessor (which we cannot simply use due
-# to @generated@ files living in a different directory to make meson happy). we do
-# not want to disable the links preprocessor entirely though because that requires
-# disabling *all* built-in preprocessors and selectively reenabling those we want.
-[preprocessor.substitute]
-command = "python3 doc/manual/substitute.py"
-before = ["anchors", "links"]
+edit-url-template = "https://github.com/NixOS/nix/tree/master/doc/manual/{path}"
+git-repository-url = "https://github.com/NixOS/nix"

 [preprocessor.anchors]
 renderers = ["html"]
 command = "jq --from-file doc/manual/anchors.jq"

-[output.markdown]
-
 [output.linkcheck]
 # no Internet during the build (in the sandbox)
 follow-web-links = false
--- a/doc/manual/change-authors.yml
+++ b/doc/manual/change-authors.yml
@ -1,149 +0,0 @@
-# This file is a mapping of metadata for change authors, sort of like
-# maintainer-list.nix in nixpkgs.
-#
-# It's used for crediting people accurately in release notes. The release notes
-# script will link to forgejo, then to GitHub if forgejo is not present.
-#
-# When adding someone from outside the Lix project, you generally want to simply link their GitHub profile without adding a display name unless they are well-known in the community by that display name.
-#
-# See doc/manual/src/contributing/hacking.md for more documentation on this file's format and typical usage.
-9999years:
-  display_name: wiggles
-  forgejo: rbt
-  github: 9999years
-
-Artturin:
-  github: Artturin
-
-DavHau:
-  github: DavHau
-
-Kha:
-  github: Kha
-
-Lunaphied:
-  forgejo: Lunaphied
-  github: Lunaphied
-
-Qyriad:
-  forgejo: Qyriad
-  github: Qyriad
-
-SharzyL:
-  github: SharzyL
-
-alois31:
-  forgejo: alois31
-  github: alois31
-
-artemist:
-  display_name: Artemis Tosini
-  forgejo: artemist
-
-cole-h:
-  display_name: Cole Helbling
-  github: cole-h
-
-delan:
-  display_name: delan
-  forgejo: delan
-  github: delan
-
-edolstra:
-  display_name: Eelco Dolstra
-  github: edolstra
-
-ericson:
-  display_name: John Ericson
-  github: ericson2314
-
-goldstein:
-  display_name: goldstein
-  forgejo: goldstein
-  github: GoldsteinE
-
-horrors:
-  display_name: eldritch horrors
-  forgejo: pennae
-  github: pennae
-
-iFreilicht:
-  github: iFreilicht
-
-isabelroses:
-  forgejo: isabelroses
-  github: isabelroses
-
-jade:
-  forgejo: jade
-  github: lf-
-
-kjeremy:
-  github: kjeremy
-
-kloenk:
-  forgejo: kloenk
-  github: kloenk
-
-lovesegfault:
-  github: lovesegfault
-
-ma27:
-  forgejo: ma27
-  github: ma27
-
-matthewbauer:
-  github: matthewbauer
-
-midnightveil:
-  display_name: julia
-  forgejo: midnightveil
-  github: midnightveil
-
-ncfavier:
-  github: ncfavier
-
-piegames:
-  display_name: piegames
-  forgejo: piegames
-  github: piegamesde
-
-puck:
-  display_name: puck
-  forgejo: puck
-  github: puckipedia
-
-quantumjump:
-  display_name: Quantum Jump
-  github: QuantumBJump
-
-r-vdp:
-  github: r-vdp
-
-raito:
-  display_name: Raito Bezarius
-  forgejo: raito
-  github: RaitoBezarius
-
-roberth:
-  display_name: Robert Hensing
-  github: roberth
-
-thufschmitt:
-  display_name: Théophane Hufschmitt
-  github: thufschmitt
-
-tomberek:
-  display_name: Tom Bereknyei
-  github: tomberek
-
-valentin:
-  display_name: Valentin Gagarin
-  github: fricklerhandwerk
-
-winter:
-  forgejo: winter
-  github: winterqt
-
-yshui:
-  github: yshui
--- a/doc/manual/generate-builtin-constants.nix
+++ b/doc/manual/generate-builtin-constants.nix
@ -5,13 +5,7 @@ in

 builtinsInfo:
 let
-  showBuiltin =
-    name:
-    {
-      doc,
-      type,
-      impure-only,
-    }:
+  showBuiltin = name: { doc, type, impure-only }:
    let
      type' = optionalString (type != null) " (${type})";

--- a/doc/manual/generate-builtins.nix
+++ b/doc/manual/generate-builtins.nix
@ -5,14 +5,7 @@ in

 builtinsInfo:
 let
-  showBuiltin =
-    name:
-    {
-      doc,
-      args,
-      arity,
-      experimental-feature,
-    }:
+  showBuiltin = name: { doc, args, arity, experimental-feature }:
    let
      experimentalNotice = optionalString (experimental-feature != null) ''
        This function is only available if the [${experimental-feature}](@docroot@/contributing/experimental-features.md#xp-feature-${experimental-feature}) experimental feature is enabled.
--- a/doc/manual/generate-deps.py
+++ b/doc/manual/generate-deps.py
@ -1,22 +0,0 @@
-#!/usr/bin/env python3
-
-import glob
-import sys
-
-# meson expects makefile-style dependency declarations, i.e.
-#
-#   target: dependency...
-#
-# meson seems to pass depfiles straight on to ninja even though
-# it also parses the file itself (or at least has code to do so
-# in its tree), so we must live by ninja's rules: only slashes,
-# spaces and octothorpes can be escaped, anything else is taken
-# literally. since the rules for these aren't even the same for
-# all three we will just fail when we encounter any of them (if
-# asserts are off for some reason the depfile will likely point
-# to nonexistant paths, making everything phony and thus fine.)
-for path in glob.glob(sys.argv[1] + '/**', recursive=True):
-    assert '\\' not in path
-    assert ' ' not in path
-    assert '#' not in path
-    print("ignored:", path)
--- a/doc/manual/generate-features-shortlist.nix
+++ b/doc/manual/generate-features-shortlist.nix
@ -1,14 +0,0 @@
-# Usually "experimental" or "deprecated"
-kind:
-# "xp" or "dp"
-kindShort:
-
-with builtins;
-with import ./utils.nix;
-
-let
-  showExperimentalFeature = name: doc: ''
-    - [`${name}`](@docroot@/contributing/${kind}-features.md#${kindShort}-feature-${name})
-  '';
-in
-xps: indent "  " (concatStrings (attrValues (mapAttrs showExperimentalFeature xps)))
--- a/doc/manual/generate-features.nix
+++ b/doc/manual/generate-features.nix
@ -1,18 +0,0 @@
-# Usually "experimental" or "deprecated"
-_kind:
-# "xp" or "dp"
-kindShort:
-
-with builtins;
-with import ./utils.nix;
-
-let
-  showFeature =
-    name: doc:
-    squash ''
-      ## [`${name}`]{#${kindShort}-feature-${name}}
-
-      ${doc}
-    '';
-in
-xps: (concatStringsSep "\n" (attrValues (mapAttrs showFeature xps)))
--- a/doc/manual/generate-manpage.nix
+++ b/doc/manual/generate-manpage.nix
@ -1,26 +1,8 @@
 let
  inherit (builtins)
-    attrNames
-    attrValues
-    fromJSON
-    listToAttrs
-    mapAttrs
-    concatStringsSep
-    concatMap
-    length
-    lessThan
-    replaceStrings
-    sort
-    ;
-  inherit (import ./utils.nix)
-    concatStrings
-    optionalString
-    filterAttrs
-    trim
-    squash
-    unique
-    showSettings
-    ;
+    attrNames attrValues fromJSON listToAttrs mapAttrs
+    concatStringsSep concatMap length lessThan replaceStrings sort;
+  inherit (import ./utils.nix) concatStrings optionalString filterAttrs trim squash unique showSettings;
 in

 inlineHTML: commandDump:
@ -29,13 +11,7 @@ let

  commandInfo = fromJSON commandDump;

-  showCommand =
-    {
-      command,
-      details,
-      filename,
-      toplevel,
-    }:
+  showCommand = { command, details, filename, toplevel }:
    let

      result = ''
@ -59,27 +35,26 @@ let
        ${maybeOptions}
      '';

-      showSynopsis =
-        command: args:
+      showSynopsis = command: args:
        let
-          showArgument = arg: "*${arg.label}*" + optionalString (!arg ? arity) "...";
+          showArgument = arg: "*${arg.label}*" + optionalString (! arg ? arity) "...";
          arguments = concatStringsSep " " (map showArgument args);
-        in
-        ''
-          `${command}` [*option*...] ${arguments}
+        in ''
+         `${command}` [*option*...] ${arguments}
        '';

-      maybeSubcommands = optionalString (details ? commands && details.commands != { }) ''
-        where *subcommand* is one of the following:
+      maybeSubcommands = optionalString (details ? commands && details.commands != {})
+         ''
+           where *subcommand* is one of the following:

-        ${subcommands}
-      '';
+           ${subcommands}
+         '';

-      subcommands = if length categories > 1 then listCategories else listSubcommands details.commands;
+      subcommands = if length categories > 1
+        then listCategories
+        else listSubcommands details.commands;

-      categories = sort (x: y: x.id < y.id) (
-        unique (map (cmd: cmd.category) (attrValues details.commands))
-      );
+      categories = sort (x: y: x.id < y.id) (unique (map (cmd: cmd.category) (attrValues details.commands)));

      listCategories = concatStrings (map showCategory categories);

@ -96,11 +71,11 @@ let
      '';

      # TODO: move this confusing special case out of here when implementing #8496
-      maybeStoreDocs = optionalString (details ? doc) (
-        replaceStrings [ "@stores@" ] [ storeDocs ] details.doc
-      );
+      maybeStoreDocs = optionalString
+        (details ? doc)
+        (replaceStrings ["@stores@"] [storeDocs] details.doc);

-      maybeOptions = optionalString (details.flags != { }) ''
+      maybeOptions = optionalString (details.flags != {}) ''
        # Options

        ${showOptions details.flags toplevel.flags}
@ -110,70 +85,51 @@ let
        > See [`man nix.conf`](@docroot@/command-ref/conf-file.md#command-line-flags) for overriding configuration settings with command line flags.
      '';

-      showOptions =
-        options: commonOptions:
+      showOptions = options: commonOptions:
        let
          allOptions = options // commonOptions;
          showCategory = cat: ''
            ${optionalString (cat != "") "**${cat}:**"}

            ${listOptions (filterAttrs (n: v: v.category == cat) allOptions)}
-          '';
+            '';
          listOptions = opts: concatStringsSep "\n" (attrValues (mapAttrs showOption opts));
-          showOption =
-            name: option:
+          showOption = name: option:
            let
              result = trim ''
                - ${item}
                  ${option.description}
              '';
-              item =
-                if inlineHTML then
-                  ''<span id="opt-${name}">[`--${name}`](#opt-${name})</span> ${shortName} ${labels}''
-                else
-                  "`--${name}` ${shortName} ${labels}";
-              shortName = optionalString (option ? shortName) ("/ `-${option.shortName}`");
-              labels = optionalString (option ? labels) (concatStringsSep " " (map (s: "*${s}*") option.labels));
-            in
-            result;
+              item = if inlineHTML
+                then ''<span id="opt-${name}">[`--${name}`](#opt-${name})</span> ${shortName} ${labels}''
+                else "`--${name}` ${shortName} ${labels}";
+              shortName = optionalString
+                (option ? shortName)
+                ("/ `-${option.shortName}`");
+              labels = optionalString
+                (option ? labels)
+                (concatStringsSep " " (map (s: "*${s}*") option.labels));
+            in result;
          categories = sort lessThan (unique (map (cmd: cmd.category) (attrValues allOptions)));
-        in
-        concatStrings (map showCategory categories);
-    in
-    squash result;
+        in concatStrings (map showCategory categories);
+    in squash result;

  appendName = filename: name: (if filename == "nix" then "nix3" else filename) + "-" + name;

-  processCommand =
-    {
-      command,
-      details,
-      filename,
-      toplevel,
-    }:
+  processCommand = { command, details, filename, toplevel }:
    let
      cmd = {
        inherit command;
        name = filename + ".md";
-        value = showCommand {
-          inherit
-            command
-            details
-            filename
-            toplevel
-            ;
-        };
+        value = showCommand { inherit command details filename toplevel; };
      };
-      subcommand =
-        subCmd:
-        processCommand {
-          command = command + " " + subCmd;
-          details = details.commands.${subCmd};
-          filename = appendName filename subCmd;
-          inherit toplevel;
-        };
-    in
-    [ cmd ] ++ concatMap subcommand (attrNames details.commands or { });
+      subcommand = subCmd: processCommand {
+        command = command + " " + subCmd;
+        details = details.commands.${subCmd};
+        filename = appendName filename subCmd;
+        inherit toplevel;
+      };
+    in [ cmd ] ++ concatMap subcommand (attrNames details.commands or {});

  manpages = processCommand {
    command = "nix";
@ -182,15 +138,14 @@ let
    toplevel = commandInfo.args;
  };

+  tableOfContents = let
+    showEntry = page:
+      "    - [${page.command}](command-ref/new-cli/${page.name})";
+    in concatStringsSep "\n" (map showEntry manpages) + "\n";
+
  storeDocs =
    let
-      showStore =
-        name:
-        {
-          settings,
-          doc,
-          experimentalFeature,
-        }:
+      showStore = name: { settings, doc, experimentalFeature }:
        let
          experimentalFeatureNote = optionalString (experimentalFeature != null) ''
            > **Warning**
@ -206,8 +161,7 @@ let
            extra-experimental-features = ${experimentalFeature}
            ```
          '';
-        in
-        ''
+        in ''
          ## ${name}

          ${doc}
@ -218,7 +172,6 @@ let

          ${showSettings { inherit inlineHTML; } settings}
        '';
-    in
-    concatStrings (attrValues (mapAttrs showStore commandInfo.stores));
-in
-listToAttrs manpages
+    in concatStrings (attrValues (mapAttrs showStore commandInfo.stores));
+
+in (listToAttrs manpages) // { "SUMMARY.md" = tableOfContents; }
--- a/doc/manual/generate-xp-features-shortlist.nix
+++ b/doc/manual/generate-xp-features-shortlist.nix
@ -0,0 +1,9 @@
+with builtins;
+with import ./utils.nix;
+
+let
+  showExperimentalFeature = name: doc:
+    ''
+      - [`${name}`](@docroot@/contributing/experimental-features.md#xp-feature-${name})
+    '';
+in xps: indent "  " (concatStrings (attrValues (mapAttrs showExperimentalFeature xps)))
--- a/doc/manual/generate-xp-features.nix
+++ b/doc/manual/generate-xp-features.nix
@ -0,0 +1,11 @@
+with builtins;
+with import ./utils.nix;
+
+let
+  showExperimentalFeature = name: doc:
+    squash ''
+      ## [`${name}`]{#xp-feature-${name}}
+
+      ${doc}
+    '';
+in xps: (concatStringsSep "\n" (attrValues (mapAttrs showExperimentalFeature xps)))
--- a/doc/manual/json-to-tree.py
+++ b/doc/manual/json-to-tree.py
@ -1,61 +0,0 @@
-#!/usr/bin/env python3
-
-"""
-This script is a helper for this project's Meson buildsystem, to replace its
-usage of `nix eval --write-to`. Writing a JSON object as a nested directory
-tree is more generic, easier to maintain, and far, far less cursed. Nix
-has 'good' support for JSON output. Let's just use it.
-"""
-
-import argparse
-from pathlib import Path
-import json
-import sys
-
-name = 'json-to-tree.py'
-
-def log(*args, **kwargs):
-    kwargs['file'] = sys.stderr
-    return print(f'{name}:', *args, **kwargs)
-
-def write_dict_to_directory(current_directory: Path, data: dict, files_written=0):
-    current_directory.mkdir(parents=True, exist_ok=True)
-    for key, value in data.items():
-        nested_path = current_directory / key
-        match value:
-            case dict(nested_data):
-                files_written += write_dict_to_directory(nested_path, nested_data)
-
-            case str(content):
-                nested_path.write_text(content)
-                files_written += 1
-
-            case rest:
-                assert False, \
-                    f'should have been called on a dict or string, not {type(rest)=}\n\t{rest=}'
-
-    return files_written
-
-def main():
-    parser = argparse.ArgumentParser(name)
-    parser.add_argument('-i', '--input', type=argparse.FileType('r'), default='-',
-        help='The JSON input to operate on and output as a directory tree',
-    )
-    parser.add_argument('-o', '--output', type=Path, required=True,
-        help='The place to put the directory tree',
-    )
-    args = parser.parse_args()
-
-    json_string = args.input.read()
-
-    try:
-        data = json.loads(json_string)
-    except json.JSONDecodeError:
-        log(f'could not decode JSON from input: {json_string}')
-        raise
-
-
-    files_written = write_dict_to_directory(args.output, data)
-    log(f'wrote {files_written} files')
-
-sys.exit(main())
--- a/doc/manual/local.mk
+++ b/doc/manual/local.mk
@ -0,0 +1,218 @@
+ifeq ($(doc_generate),yes)
+
+# The version of Nix used to generate the doc. Can also be
+# `$(nix_INSTALL_PATH)` or just `nix` (to grap ambient from the `PATH`),
+# if one prefers.
+doc_nix = $(nix_PATH)
+
+MANUAL_SRCS := \
+	$(call rwildcard, $(d)/src, *.md) \
+	$(call rwildcard, $(d)/src, */*.md)
+
+man-pages := $(foreach n, \
+	nix-env.1 nix-store.1 \
+	nix-build.1 nix-shell.1 nix-instantiate.1 \
+	nix-collect-garbage.1 \
+	nix-prefetch-url.1 nix-channel.1 \
+	nix-hash.1 nix-copy-closure.1 \
+	nix.conf.5 nix-daemon.8 \
+	nix-profiles.5 \
+, $(d)/$(n))
+
+# man pages for subcommands
+# convert from `$(d)/src/command-ref/nix-{1}/{2}.md` to `$(d)/nix-{1}-{2}.1`
+# FIXME: unify with how nix3-cli man pages are generated
+man-pages += $(foreach subcommand, \
+	$(filter-out %opt-common.md %env-common.md, $(wildcard $(d)/src/command-ref/nix-*/*.md)), \
+	$(d)/$(subst /,-,$(subst $(d)/src/command-ref/,,$(subst .md,.1,$(subcommand)))))
+
+clean-files += $(d)/*.1 $(d)/*.5 $(d)/*.8
+
+# Provide a dummy environment for nix, so that it will not access files outside the macOS sandbox.
+# Set cores to 0 because otherwise nix show-config resolves the cores based on the current machine
+dummy-env = env -i \
+	HOME=/dummy \
+	NIX_CONF_DIR=/dummy \
+	NIX_SSL_CERT_FILE=/dummy/no-ca-bundle.crt \
+	NIX_STATE_DIR=/dummy \
+	NIX_CONFIG='cores = 0'
+
+nix-eval = $(dummy-env) $(doc_nix) eval --experimental-features nix-command -I nix/corepkgs=corepkgs --store dummy:// --impure --raw
+
+# re-implement mdBook's include directive to make it usable for terminal output and for proper @docroot@ substitution
+define process-includes
+	while read -r line; do \
+		set -euo pipefail; \
+		filename="$$(dirname $(1))/$$(sed 's/{{#include \(.*\)}}/\1/'<<< $$line)"; \
+		test -f "$$filename" || ( echo "#include-d file '$$filename' does not exist." >&2; exit 1; ); \
+		matchline="$$(sed 's|/|\\/|g' <<< $$line)"; \
+		sed -i "/$$matchline/r $$filename" $(2); \
+		sed -i "s/$$matchline//" $(2); \
+	done < <(grep '{{#include' $(1))
+endef
+
+$(d)/nix-env-%.1: $(d)/src/command-ref/nix-env/%.md
+	@printf "Title: %s\n\n" "$(subst nix-env-,nix-env --,$$(basename "$@" .1))" > $^.tmp
+	$(render-subcommand)
+
+$(d)/nix-store-%.1: $(d)/src/command-ref/nix-store/%.md
+	@printf -- 'Title: %s\n\n' "$(subst nix-store-,nix-store --,$$(basename "$@" .1))" > $^.tmp
+	$(render-subcommand)
+
+# FIXME: there surely is some more deduplication to be achieved here with even darker Make magic
+define render-subcommand
+  @cat $^ >> $^.tmp
+	@$(call process-includes,$^,$^.tmp)
+	$(trace-gen) lowdown -sT man --nroff-nolinks -M section=1 $^.tmp -o $@
+	@# fix up `lowdown`'s automatic escaping of `--`
+	@# https://github.com/kristapsdz/lowdown/blob/edca6ce6d5336efb147321a43c47a698de41bb7c/entity.c#L202
+	@sed -i 's/\e\[u2013\]/--/' $@
+	@rm $^.tmp
+endef
+
+
+$(d)/%.1: $(d)/src/command-ref/%.md
+	@printf "Title: %s\n\n" "$$(basename $@ .1)" > $^.tmp
+	@cat $^ >> $^.tmp
+	@$(call process-includes,$^,$^.tmp)
+	$(trace-gen) lowdown -sT man --nroff-nolinks -M section=1 $^.tmp -o $@
+	@rm $^.tmp
+
+$(d)/%.8: $(d)/src/command-ref/%.md
+	@printf "Title: %s\n\n" "$$(basename $@ .8)" > $^.tmp
+	@cat $^ >> $^.tmp
+	$(trace-gen) lowdown -sT man --nroff-nolinks -M section=8 $^.tmp -o $@
+	@rm $^.tmp
+
+$(d)/nix.conf.5: $(d)/src/command-ref/conf-file.md
+	@printf "Title: %s\n\n" "$$(basename $@ .5)" > $^.tmp
+	@cat $^ >> $^.tmp
+	@$(call process-includes,$^,$^.tmp)
+	$(trace-gen) lowdown -sT man --nroff-nolinks -M section=5 $^.tmp -o $@
+	@rm $^.tmp
+
+$(d)/nix-profiles.5: $(d)/src/command-ref/files/profiles.md
+	@printf "Title: %s\n\n" "$$(basename $@ .5)" > $^.tmp
+	@cat $^ >> $^.tmp
+	$(trace-gen) lowdown -sT man --nroff-nolinks -M section=5 $^.tmp -o $@
+	@rm $^.tmp
+
+$(d)/src/SUMMARY.md: $(d)/src/SUMMARY.md.in $(d)/src/SUMMARY-rl-next.md $(d)/src/command-ref/new-cli $(d)/src/contributing/experimental-feature-descriptions.md
+	@cp $< $@
+	@$(call process-includes,$@,$@)
+
+$(d)/src/command-ref/new-cli: $(d)/nix.json $(d)/utils.nix $(d)/generate-manpage.nix $(doc_nix)
+	@rm -rf $@ $@.tmp
+	$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-manpage.nix true (builtins.readFile $<)'
+	@mv $@.tmp $@
+
+$(d)/src/command-ref/conf-file.md: $(d)/conf-file.json $(d)/utils.nix $(d)/src/command-ref/conf-file-prefix.md $(d)/src/command-ref/experimental-features-shortlist.md $(doc_nix)
+	@cat doc/manual/src/command-ref/conf-file-prefix.md > $@.tmp
+	$(trace-gen) $(nix-eval) --expr '(import doc/manual/utils.nix).showSettings { inlineHTML = true; } (builtins.fromJSON (builtins.readFile $<))' >> $@.tmp;
+	@mv $@.tmp $@
+
+$(d)/nix.json: $(doc_nix)
+	$(trace-gen) $(dummy-env) $(doc_nix) __dump-cli > $@.tmp
+	@mv $@.tmp $@
+
+$(d)/conf-file.json: $(doc_nix)
+	$(trace-gen) $(dummy-env) $(doc_nix) show-config --json --experimental-features nix-command > $@.tmp
+	@mv $@.tmp $@
+
+$(d)/src/contributing/experimental-feature-descriptions.md: $(d)/xp-features.json $(d)/utils.nix $(d)/generate-xp-features.nix $(doc_nix)
+	@rm -rf $@ $@.tmp
+	$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-xp-features.nix (builtins.fromJSON (builtins.readFile $<))'
+	@mv $@.tmp $@
+
+$(d)/src/command-ref/experimental-features-shortlist.md: $(d)/xp-features.json $(d)/utils.nix $(d)/generate-xp-features-shortlist.nix $(doc_nix)
+	@rm -rf $@ $@.tmp
+	$(trace-gen) $(nix-eval) --write-to $@.tmp --expr 'import doc/manual/generate-xp-features-shortlist.nix (builtins.fromJSON (builtins.readFile $<))'
+	@mv $@.tmp $@
+
+$(d)/xp-features.json: $(doc_nix)
+	$(trace-gen) $(dummy-env) NIX_PATH=nix/corepkgs=corepkgs $(doc_nix) __dump-xp-features > $@.tmp
+	@mv $@.tmp $@
+
+$(d)/src/language/builtins.md: $(d)/language.json $(d)/generate-builtins.nix $(d)/src/language/builtins-prefix.md $(doc_nix)
+	@cat doc/manual/src/language/builtins-prefix.md > $@.tmp
+	$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-builtins.nix (builtins.fromJSON (builtins.readFile $<)).builtins' >> $@.tmp;
+	@cat doc/manual/src/language/builtins-suffix.md >> $@.tmp
+	@mv $@.tmp $@
+
+$(d)/src/language/builtin-constants.md: $(d)/language.json $(d)/generate-builtin-constants.nix $(d)/src/language/builtin-constants-prefix.md $(doc_nix)
+	@cat doc/manual/src/language/builtin-constants-prefix.md > $@.tmp
+	$(trace-gen) $(nix-eval) --expr 'import doc/manual/generate-builtin-constants.nix (builtins.fromJSON (builtins.readFile $<)).constants' >> $@.tmp;
+	@cat doc/manual/src/language/builtin-constants-suffix.md >> $@.tmp
+	@mv $@.tmp $@
+
+$(d)/language.json: $(doc_nix)
+	$(trace-gen) $(dummy-env) NIX_PATH=nix/corepkgs=corepkgs $(doc_nix) __dump-language > $@.tmp
+	@mv $@.tmp $@
+
+# Generate "Upcoming release" notes (or clear it and remove from menu)
+$(d)/src/release-notes/rl-next.md: $(d)/rl-next $(d)/rl-next/*
+	@if type -p changelog-d > /dev/null; then \
+		echo "  GEN   " $@; \
+		changelog-d doc/manual/rl-next > $@; \
+	else \
+		echo "  NULL  " $@; \
+		true > $@; \
+	fi
+
+$(d)/src/SUMMARY-rl-next.md: $(d)/src/release-notes/rl-next.md
+	$(trace-gen) true
+	@if [ -s $< ]; then \
+		echo '  - [Upcoming release](release-notes/rl-next.md)' > $@; \
+	else \
+	  true > $@; \
+	fi
+
+# Generate the HTML manual.
+.PHONY: manual-html
+manual-html: $(docdir)/manual/index.html
+install: $(docdir)/manual/index.html
+
+# Generate 'nix' manpages.
+install: $(mandir)/man1/nix3-manpages
+man: doc/manual/generated/man1/nix3-manpages
+all: doc/manual/generated/man1/nix3-manpages
+
+# FIXME: unify with how the other man pages are generated.
+# this one works differently and does not use any of the amenities provided by `/mk/lib.mk`.
+$(mandir)/man1/nix3-manpages: doc/manual/generated/man1/nix3-manpages
+	@mkdir -p $(DESTDIR)$$(dirname $@)
+	$(trace-install) install -m 0644 $$(dirname $<)/* $(DESTDIR)$$(dirname $@)
+
+doc/manual/generated/man1/nix3-manpages: $(d)/src/command-ref/new-cli
+	@mkdir -p $(DESTDIR)$$(dirname $@)
+	$(trace-gen) for i in doc/manual/src/command-ref/new-cli/*.md; do \
+		name=$$(basename $$i .md); \
+		tmpFile=$$(mktemp); \
+		if [[ $$name = SUMMARY ]]; then continue; fi; \
+		printf "Title: %s\n\n" "$$name" > $$tmpFile; \
+		cat $$i >> $$tmpFile; \
+		lowdown -sT man --nroff-nolinks -M section=1 $$tmpFile -o $(DESTDIR)$$(dirname $@)/$$name.1; \
+		rm $$tmpFile; \
+	done
+	@touch $@
+
+$(docdir)/manual/index.html: $(MANUAL_SRCS) $(d)/book.toml $(d)/anchors.jq $(d)/custom.css $(d)/src/SUMMARY.md $(d)/src/command-ref/new-cli $(d)/src/contributing/experimental-feature-descriptions.md $(d)/src/command-ref/conf-file.md $(d)/src/language/builtins.md $(d)/src/language/builtin-constants.md $(d)/src/release-notes/rl-next.md
+	$(trace-gen) \
+		tmp="$$(mktemp -d)"; \
+		cp -r doc/manual "$$tmp"; \
+		find "$$tmp" -name '*.md' | while read -r file; do \
+			$(call process-includes,$$file,$$file); \
+		done; \
+		find "$$tmp" -name '*.md' | while read -r file; do \
+			docroot="$$(realpath --relative-to="$$(dirname "$$file")" $$tmp/manual/src)"; \
+			sed -i "s,@docroot@,$$docroot,g" "$$file"; \
+		done; \
+		set -euo pipefail; \
+		RUST_LOG=warn mdbook build "$$tmp/manual" -d $(DESTDIR)$(docdir)/manual.tmp 2>&1 \
+			| { grep -Fv "because fragment resolution isn't implemented" || :; }; \
+		rm -rf "$$tmp/manual"
+	@rm -rf $(DESTDIR)$(docdir)/manual
+	@mv $(DESTDIR)$(docdir)/manual.tmp/html $(DESTDIR)$(docdir)/manual
+	@rm -rf $(DESTDIR)$(docdir)/manual.tmp
+
+endif
--- a/doc/manual/meson.build
+++ b/doc/manual/meson.build
@ -1,363 +0,0 @@
-nix_env_for_docs = {
-  'HOME': '/dummy',
-  'NIX_CONF_DIR': '/dummy',
-  'NIX_SSL_CERT_FILE': '/dummy/no-ca-bundle.crt',
-  'NIX_STATE_DIR': '/dummy',
-  'NIX_CONFIG': 'cores = 0',
-}
-
-nix_for_docs = [ nix, '--experimental-features', 'nix-command' ]
-nix_eval_for_docs_common = nix_for_docs + [
-  'eval',
-  '-I', 'nix/corepkgs=corepkgs',
-  '--store', 'dummy://',
-  '--impure',
-]
-nix_eval_for_docs = nix_eval_for_docs_common + '--raw'
-
-conf_file_json = custom_target(
-  command : nix_for_docs + [ 'show-config', '--json' ],
-  capture : true,
-  output : 'conf-file.json',
-  env : nix_env_for_docs,
-  # FIXME: put the actual lib targets in here? meson have introspection challenge 2024 though.
-  build_always_stale : true,
-)
-
-nix_conf_file_md_body = custom_target(
-  command : nix_eval_for_docs + [
-    '--expr',
-    '(import @INPUT0@).showSettings { inlineHTML = true; } (builtins.fromJSON (builtins.readFile @INPUT1@))',
-  ],
-  capture : true,
-  input : [
-    'utils.nix',
-    conf_file_json,
-  ],
-  output : 'conf-file.md.body',
-  env : nix_env_for_docs,
-)
-
-nix_conf_file_md = custom_target(
-  command : [ 'cat', '@INPUT@' ],
-  capture : true,
-  input : [
-    'src/command-ref/conf-file.md',
-    nix_conf_file_md_body,
-  ],
-  output : 'conf-file.md',
-)
-
-nix_exp_features_json = custom_target(
-  command : [ nix, '__dump-xp-features' ],
-  capture : true,
-  output : 'xp-features.json',
-  # FIXME: put the actual lib targets in here? meson have introspection challenge 2024 though.
-  build_always_stale : true,
-)
-
-language_json = custom_target(
-  command: [nix, '__dump-language'],
-  output : 'language.json',
-  capture : true,
-  env : nix_env_for_docs,
-  # FIXME: put the actual lib targets in here? meson have introspection challenge 2024 though.
-  build_always_stale : true,
-)
-
-nix3_cli_json = custom_target(
-  command : [ nix, '__dump-cli' ],
-  capture : true,
-  output : 'nix.json',
-  env : nix_env_for_docs,
-  # FIXME: put the actual lib targets in here? meson have introspection challenge 2024 though.
-  build_always_stale : true,
-)
-
-generate_manual_deps = files(
-  'generate-deps.py',
-)
-
-# Generates builtins.md and builtin-constants.md.
-subdir('src/language')
-# Generates new-cli pages, {experimental,deprecated}-features-shortlist.md, and conf-file.md.
-subdir('src/command-ref')
-# Generates {experimental,deprecated}-feature-descriptions.md.
-subdir('src/contributing')
-# Generates rl-next-generated.md.
-subdir('src/release-notes')
-
-manual = custom_target(
-  'manual',
-  command : [
-    bash,
-    '-euo', 'pipefail',
-    '-c',
-    '''
-        @0@ @INPUT0@ @CURRENT_SOURCE_DIR@ > @DEPFILE@
-        cd @SOURCE_ROOT@
-        @1@ build doc/manual -d @2@ | { grep -Fv "because fragment resolution isn't implemented" || :; }
-        rm -rf @2@/manual
-        mv @2@/html @2@/manual
-        find @2@/manual -iname meson.build -delete
-    '''.format(
-      python.full_path(),
-      mdbook.full_path(),
-      meson.current_build_dir(),
-    ),
-  ],
-  input : [
-    generate_manual_deps,
-    'book.toml',
-    'anchors.jq',
-    'custom.css',
-    nix3_cli_files,
-    experimental_features_shortlist_md,
-    experimental_feature_descriptions_md,
-    deprecated_features_shortlist_md,
-    deprecated_feature_descriptions_md,
-    conf_file_md,
-    builtins_md,
-    builtin_constants_md,
-    rl_next_generated,
-    nix,
-  ],
-  output : [
-    'manual',
-    'markdown',
-  ],
-  depfile : 'manual.d',
-  env : {
-    'RUST_LOG': 'info',
-    'MDBOOK_SUBSTITUTE_SEARCH': meson.current_build_dir() / 'src',
-  },
-)
-manual_html = manual[0]
-manual_md = manual[1]
-
-install_subdir(
-  manual_html.full_path(),
-  install_dir : datadir / 'doc/nix',
-)
-
-nix_nested_manpages = [
-  [ 'nix-env',
-    [
-      'delete-generations',
-      'install',
-      'list-generations',
-      'query',
-      'rollback',
-      'set-flag',
-      'set',
-      'switch-generation',
-      'switch-profile',
-      'uninstall',
-      'upgrade',
-    ],
-  ],
-  [ 'nix-store',
-    [
-      'add-fixed',
-      'add',
-      'delete',
-      'dump-db',
-      'dump',
-      'export',
-      'gc',
-      'generate-binary-cache-key',
-      'import',
-      'load-db',
-      'optimise',
-      'print-env',
-      'query',
-      'read-log',
-      'realise',
-      'repair-path',
-      'restore',
-      'serve',
-      'verify',
-      'verify-path',
-    ],
-  ],
-]
-
-foreach command : nix_nested_manpages
-  foreach page : command[1]
-    title = command[0] + ' --' + page
-    section = '1'
-    custom_target(
-      command : [
-        './render-manpage.sh',
-        '--out-no-smarty',
-        title,
-        section,
-        '@INPUT0@/command-ref' / command[0] / (page + '.md'),
-        '@OUTPUT0@',
-      ],
-      input : [
-        manual_md,
-        nix,
-      ],
-      output : command[0] + '-' + page + '.1',
-      install : true,
-      install_dir : mandir / 'man1',
-    )
-  endforeach
-endforeach
-
-nix3_manpages = [
-  'nix3-build',
-  'nix3-bundle',
-  'nix3-config',
-  'nix3-config-show',
-  'nix3-copy',
-  'nix3-daemon',
-  'nix3-derivation-add',
-  'nix3-derivation',
-  'nix3-derivation-show',
-  'nix3-develop',
-  'nix3-doctor',
-  'nix3-edit',
-  'nix3-eval',
-  'nix3-flake-archive',
-  'nix3-flake-check',
-  'nix3-flake-clone',
-  'nix3-flake-info',
-  'nix3-flake-init',
-  'nix3-flake-lock',
-  'nix3-flake',
-  'nix3-flake-metadata',
-  'nix3-flake-new',
-  'nix3-flake-prefetch',
-  'nix3-flake-show',
-  'nix3-flake-update',
-  'nix3-fmt',
-  'nix3-hash-file',
-  'nix3-hash',
-  'nix3-hash-path',
-  'nix3-hash-to-base16',
-  'nix3-hash-to-base32',
-  'nix3-hash-to-base64',
-  'nix3-hash-to-sri',
-  'nix3-help',
-  'nix3-help-stores',
-  'nix3-key-convert-secret-to-public',
-  'nix3-key-generate-secret',
-  'nix3-key',
-  'nix3-log',
-  'nix3-nar-cat',
-  'nix3-nar-dump-path',
-  'nix3-nar-ls',
-  'nix3-nar',
-  'nix3-path-info',
-  'nix3-print-dev-env',
-  'nix3-profile-diff-closures',
-  'nix3-profile-history',
-  'nix3-profile-install',
-  'nix3-profile-list',
-  'nix3-profile',
-  'nix3-profile-remove',
-  'nix3-profile-rollback',
-  'nix3-profile-upgrade',
-  'nix3-profile-wipe-history',
-  'nix3-realisation-info',
-  'nix3-realisation',
-  'nix3-registry-add',
-  'nix3-registry-list',
-  'nix3-registry',
-  'nix3-registry-pin',
-  'nix3-registry-remove',
-  'nix3-repl',
-  'nix3-run',
-  'nix3-search',
-  'nix3-shell',
-  'nix3-store-add-file',
-  'nix3-store-add-path',
-  'nix3-store-cat',
-  'nix3-store-copy-log',
-  'nix3-store-copy-sigs',
-  'nix3-store-delete',
-  'nix3-store-diff-closures',
-  'nix3-store-dump-path',
-  'nix3-store-gc',
-  'nix3-store-ls',
-  'nix3-store-make-content-addressed',
-  'nix3-store',
-  'nix3-store-optimise',
-  'nix3-store-path-from-hash-part',
-  'nix3-store-ping',
-  'nix3-store-prefetch-file',
-  'nix3-store-repair',
-  'nix3-store-sign',
-  'nix3-store-verify',
-  'nix3-upgrade-nix',
-  'nix3-why-depends',
-  'nix',
-]
-
-foreach page : nix3_manpages
-  section = '1'
-  custom_target(
-    command : [
-      bash,
-      '@INPUT0@',
-      page,
-      section,
-      '@INPUT1@/command-ref/new-cli/@0@.md'.format(page),
-      '@OUTPUT@',
-    ],
-    input : [
-      'render-manpage.sh',
-      manual_md,
-      nix,
-    ],
-    output : page + '.1',
-    install : true,
-    install_dir : mandir / 'man1',
-  )
-endforeach
-
-nix_manpages = [
-  [ 'nix-env', 1 ],
-  [ 'nix-store', 1 ],
-  [ 'nix-build', 1 ],
-  [ 'nix-shell', 1 ],
-  [ 'nix-instantiate', 1 ],
-  [ 'nix-collect-garbage', 1 ],
-  [ 'nix-prefetch-url', 1 ],
-  [ 'nix-channel', 1 ],
-  [ 'nix-hash', 1 ],
-  [ 'nix-copy-closure', 1 ],
-  [ 'nix.conf', 5, 'conf-file.md' ],
-  [ 'nix-daemon', 8 ],
-  [ 'nix-profiles', 5, 'files/profiles.md' ],
-]
-
-foreach entry : nix_manpages
-  title = entry[0]
-  # nix.conf.5 and nix-profiles.5 are based off of conf-file.md and files/profiles.md,
-  # rather than a stem identical to its mdbook source.
-  # Therefore we use an optional third element of this array to override the name pattern
-  md_file = entry.get(2, title + '.md')
-  section = entry[1].to_string()
-  custom_target(
-    command : [
-      bash,
-      '@INPUT0@',
-      title,
-      section,
-      '@INPUT1@/command-ref/@0@'.format(md_file),
-      '@OUTPUT@',
-    ],
-    input : [
-      'render-manpage.sh',
-      manual_md,
-      entry.get(3, []),
-      nix,
-    ],
-    output : '@0@.@1@'.format(entry[0], entry[1]),
-    install : true,
-    install_dir : mandir / 'man@0@'.format(entry[1]),
-  )
-endforeach
--- a/doc/manual/process-includes.sh
+++ b/doc/manual/process-includes.sh
@ -1,32 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-
-infile="$1"
-outfile="$2"
-shift 2
-
-# set a search path for includes. the old makefile-based system splorked
-# everything into the source tree and was thus able to not have a search
-# path, but the meson system generates intermediate files into dedicated
-# directories separate from the source. we still retain the implicit old
-# behavior for now as the base search path, once meson is the default we
-# can revisit this and remove the implicit search path entry. it's fine.
-set -- "$(dirname "$infile")" "$@"
-
-# re-implement mdBook's include directive to make it usable for terminal output and for proper @docroot@ substitution
-(grep '{{#include' "$infile" || true) | while read -r line; do
-    found=false
-    include="$(printf "$line" | sed 's/{{#include \(.*\)}}/\1/')"
-    for path in "$@"; do
-        filename="$path/$include"
-        if [ -e "$filename" ]; then
-            found=true
-            matchline="$(printf "$line" | sed 's|/|\\/|g')"
-            sed -i "/$matchline/r $filename" "$outfile"
-            sed -i "s/$matchline//" "$outfile"
-            break
-        fi
-    done
-    $found || ( echo "#include-d file '$filename' does not exist." >&2; exit 1; )
-done
--- a/doc/manual/rclone.conf
+++ b/doc/manual/rclone.conf
@ -1,8 +0,0 @@
-[lix-docs]
-type = s3
-provider = Other
-env_auth = true
-endpoint = https://s3.lix.systems
-location_constraint = garage
-region = garage
-acl = private
--- a/doc/manual/redirects.js
+++ b/doc/manual/redirects.js
@ -24,6 +24,7 @@ const redirects = {
    "chap-writing-nix-expressions": "language/index.html",
    "part-command-ref": "command-ref/command-ref.html",
    "conf-allow-import-from-derivation": "command-ref/conf-file.html#conf-allow-import-from-derivation",
+    "conf-allow-new-privileges": "command-ref/conf-file.html#conf-allow-new-privileges",
    "conf-allowed-uris": "command-ref/conf-file.html#conf-allowed-uris",
    "conf-allowed-users": "command-ref/conf-file.html#conf-allowed-users",
    "conf-auto-optimise-store": "command-ref/conf-file.html#conf-auto-optimise-store",
@ -345,7 +346,7 @@ const redirects = {
    "linux": "uninstall.html#linux",
    "macos": "uninstall.html#macos",
    "uninstalling": "uninstall.html",
-  },
+  }
  "contributing/hacking.html": {
    "nix-with-flakes": "#building-nix-with-flakes",
    "classic-nix": "#building-nix",
--- a/doc/manual/render-manpage.sh
+++ b/doc/manual/render-manpage.sh
@ -1,25 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-
-lowdown_args=
-
-if [ "$1" = --out-no-smarty ]; then
-    lowdown_args=--out-no-smarty
-    shift
-fi
-
-[ "$#" = 4 ] || {
-    echo "wrong number of args passed" >&2
-    exit 1
-}
-
-title="$1"
-section="$2"
-infile="$3"
-outfile="$4"
-
-(
-    printf "Title: %s\n\n" "$title"
-    cat "$infile"
-) | lowdown -sT man --nroff-nolinks $lowdown_args -M section="$section" -o "$outfile"
--- a/doc/manual/rl-next/.gitkeep
+++ b/doc/manual/rl-next/.gitkeep
--- a/doc/manual/rl-next/allowsubstitutes-errors.md
+++ b/doc/manual/rl-next/allowsubstitutes-errors.md
@ -1,21 +0,0 @@
---
-synopsis: "Build failures caused by `allowSubstitutes = false` while being the wrong system now produce a decent error"
-issues: [fj#484]
-cls: [1841]
-category: Fixes
-credits: jade
---
-
-Nix allows derivations to set `allowSubstitutes = false` in order to force them to be built locally without querying substituters for them.
-This is useful for derivations that are very fast to build (especially if they produce large output).
-However, this can shoot you in the foot if the derivation *has* to be substituted such as if the derivation is for another architecture, which is what `--always-allow-substitutes` is for.
-
-Perhaps such derivations that are known to be impossible to build locally should ignore `allowSubstitutes` (irrespective of remote builders) in the future, but this at least reports the failure and solution directly.
-
-```
-$ nix build -f fail.nix
-error: a 'unicornsandrainbows-linux' with features {} is required to build '/nix/store/...-meow.drv', but I am a 'x86_64-linux' with features {...}
-
-       Hint: the failing derivation has allowSubstitutes set to false, forcing it to be built rather than substituted.
-       Passing --always-allow-substitutes to force substitution may resolve this failure if the path is available in a substituter.
-```
--- a/doc/manual/rl-next/alt-left-and-alt-right-in-repl.md
+++ b/doc/manual/rl-next/alt-left-and-alt-right-in-repl.md
@ -1,10 +0,0 @@
---
-synopsis: "`Alt+Left` and `Alt+Right` go back/forwards by words in `nix repl`"
-issues: [fj#501]
-cls: [1883]
-category: Fixes
-credits: 9999years
---
-
-`nix repl` now recognizes `Alt+Left` and `Alt+Right` for navigating by words
-when entering input in `nix repl` on more terminals/platforms.
--- a/doc/manual/rl-next/better-errors-in-nix-repl.md
+++ b/doc/manual/rl-next/better-errors-in-nix-repl.md
@ -0,0 +1,40 @@
+---
+synopsis: Concise error printing in `nix repl`
+prs: 9928
+---
+
+Previously, if an element of a list or attribute set threw an error while
+evaluating, `nix repl` would print the entire error (including source location
+information) inline. This output was clumsy and difficult to parse:
+
+```
+nix-repl> { err = builtins.throw "uh oh!"; }
+{ err = «error:
+       … while calling the 'throw' builtin
+         at «string»:1:9:
+            1| { err = builtins.throw "uh oh!"; }
+             |         ^
+
+       error: uh oh!»; }
+```
+
+Now, only the error message is displayed, making the output much more readable.
+```
+nix-repl> { err = builtins.throw "uh oh!"; }
+{ err = «error: uh oh!»; }
+```
+
+However, if the whole expression being evaluated throws an error, source
+locations and (if applicable) a stack trace are printed, just like you'd expect:
+
+```
+nix-repl> builtins.throw "uh oh!"
+error:
+       … while calling the 'throw' builtin
+         at «string»:1:1:
+            1| builtins.throw "uh oh!"
+             | ^
+
+       error: uh oh!
+```
+
--- a/doc/manual/rl-next/config
+++ b/doc/manual/rl-next/config
@ -0,0 +1,2 @@
+organization: NixOS
+repository: nix
--- a/doc/manual/rl-next/debugger-locals-for-let-expressions.md
+++ b/doc/manual/rl-next/debugger-locals-for-let-expressions.md
@ -0,0 +1,9 @@
+---
+synopsis: "`--debugger` can now access bindings from `let` expressions"
+prs: 9918
+issues: 8827.
+---
+
+Breakpoints and errors in the bindings of a `let` expression can now access
+those bindings in the debugger. Previously, only the body of `let` expressions
+could access those bindings.
--- a/doc/manual/rl-next/debugger-on-trace.md
+++ b/doc/manual/rl-next/debugger-on-trace.md
@ -0,0 +1,9 @@
+---
+synopsis: Enter the `--debugger` when `builtins.trace` is called if `debugger-on-trace` is set
+prs: 9914
+---
+
+If the `debugger-on-trace` option is set and `--debugger` is given,
+`builtins.trace` calls will behave similarly to `builtins.break` and will enter
+the debug REPL. This is useful for determining where warnings are being emitted
+from.
--- a/doc/manual/rl-next/deprecated-features.md
+++ b/doc/manual/rl-next/deprecated-features.md
@ -1,17 +0,0 @@
---
-synopsis: Deprecated language features
-issues: [fj#437]
-cls: [1785, 1736, 1735, 1744]
-category: Breaking Changes
-credits: [piegames, horrors]
---
-
-A system for deprecation (and then the planned removal) of undesired language features has been put into place.
-It is controlled via feature flags much like experimental features, except that the deprecations are enabled default,
-and can be disabled via the flags for backwards compatibility (opt-out with `--extra-deprecated-features` or the Nix configuration file).
-
- `url-literals`: **URL literals** have long been obsolete and discouraged of use, and now they are officially deprecated.
-  This means that all URLs must be properly put within quotes like all other strings.
- `rec-set-overrides`: **__overrides** is an old arcane syntax which has not been in use for more than a decade.
-  It is soft-deprecated with a warning only, with the plan to turn that into an error in a future release.
- `ancient-let`: **The old `let` syntax** (`let { body = …; … }`) is soft-deprecated with a warning as well. Use the regular `let … in` instead.
--- a/doc/manual/rl-next/drv-string-parse-hang.md
+++ b/doc/manual/rl-next/drv-string-parse-hang.md
@ -0,0 +1,6 @@
+---
+synopsis: Fix handling of truncated `.drv` files.
+prs: 9673
+---
+
+Previously a `.drv` that was truncated in the middle of a string would case nix to enter an infinite loop, eventually exhausting all memory and crashing.
--- a/doc/manual/rl-next/dup-attr-errors.md
+++ b/doc/manual/rl-next/dup-attr-errors.md
@ -0,0 +1,22 @@
+---
+synopsis: Duplicate attribute reports are more accurate
+# prs: cl 557
+---
+
+Duplicate attribute errors are now more accurate, showing the path at which an error was detected rather than the full, possibly longer, path that caused the error.
+Error reports are now
+```ShellSession
+$ nix eval --expr '{ a.b = 1; a.b.c.d = 1; }'
+error: attribute 'a.b' already defined at «string»:1:3
+       at «string»:1:12:
+            1| { a.b = 1; a.b.c.d = 1;
+             |            ^
+```
+instead of
+```ShellSession
+$ nix eval --expr '{ a.b = 1; a.b.c.d = 1; }'
+error: attribute 'a.b.c.d' already defined at «string»:1:3
+       at «string»:1:12:
+            1| { a.b = 1; a.b.c.d = 1;
+             |            ^
+```
--- a/doc/manual/rl-next/empty-search-regex.md
+++ b/doc/manual/rl-next/empty-search-regex.md
@ -0,0 +1,8 @@
+synopsis: Disallow empty search regex in `nix search`
+prs: #9481
+description: {
+
+[`nix search`](@docroot@/command-ref/new-cli/nix3-search.md) now requires a search regex to be passed. To show all packages, use `^`.
+
+}
+
--- a/doc/manual/rl-next/enter-debugger-more-reliably-in-let-and-calls.md
+++ b/doc/manual/rl-next/enter-debugger-more-reliably-in-let-and-calls.md
@ -0,0 +1,25 @@
+---
+synopsis: The `--debugger` will start more reliably in `let` expressions and function calls
+prs: 9917
+issues: 6649
+---
+
+Previously, if you attempted to evaluate this file with the debugger:
+
+```nix
+let
+  a = builtins.trace "before inner break" (
+    builtins.break "hello"
+  );
+  b = builtins.trace "before outer break" (
+    builtins.break a
+  );
+in
+  b
+```
+
+Nix would correctly enter the debugger at `builtins.break a`, but if you asked
+it to `:continue`, it would skip over the `builtins.break "hello"` expression
+entirely.
+
+Now, Nix will correctly enter the debugger at both breakpoints.
--- a/doc/manual/rl-next/env-size-reduction.md
+++ b/doc/manual/rl-next/env-size-reduction.md
@ -0,0 +1,7 @@
+---
+synopsis: Reduce eval memory usage and wall time
+prs: 9658
+---
+
+Reduce the size of the `Env` struct used in the evaluator by a pointer, or 8 bytes on most modern machines.
+This reduces memory usage during eval by around 2% and wall time by around 3%.
--- a/doc/manual/rl-next/eval-system.md
+++ b/doc/manual/rl-next/eval-system.md
@ -0,0 +1,12 @@
+---
+synopsis: Add new `eval-system` setting
+prs: 4093
+---
+
+Add a new `eval-system` option.
+Unlike `system`, it just overrides the value of `builtins.currentSystem`.
+This is more useful than overriding `system`, because you can build these derivations on remote builders which can work on the given system.
+In contrast, `system` also effects scheduling which will cause Nix to build those derivations locally even if that doesn't make sense.
+
+`eval-system` only takes effect if it is non-empty.
+If empty (the default) `system` is used as before, so there is no breakage.
--- a/doc/manual/rl-next/formal-order.md
+++ b/doc/manual/rl-next/formal-order.md
@ -0,0 +1,7 @@
+---
+synopsis: consistent order of lambda formals in printed expressions
+prs: 9874
+---
+
+Always print lambda formals in lexicographic order rather than the internal, creation-time based symbol order.
+This makes printed formals independent of the context they appear in.
--- a/doc/manual/rl-next/http-proxy-for-s3.md
+++ b/doc/manual/rl-next/http-proxy-for-s3.md
@ -1,10 +0,0 @@
---
-synopsis: HTTP proxy environment variables are now respected for S3 binary cache stores
-issues: [fj#433]
-cls: [1788]
-category: Fixes
-credits: jade
---
-
-Due to "legacy reasons" (according to the AWS C++ SDK docs), the AWS SDK ignores system proxy configuration by default.
-We turned it back on.
--- a/doc/manual/rl-next/inherit-error-positions.md
+++ b/doc/manual/rl-next/inherit-error-positions.md
@ -0,0 +1,6 @@
+---
+synopsis: fix duplicate attribute error positions for `inherit`
+prs: 9874
+---
+
+When an inherit caused a duplicate attribute error the position of the error was not reported correctly, placing the error with the inherit itself or at the start of the bindings block instead of the offending attribute name.
--- a/doc/manual/rl-next/inherit-from-by-need.md
+++ b/doc/manual/rl-next/inherit-from-by-need.md
@ -0,0 +1,7 @@
+---
+synopsis: "`inherit (x) ...` evaluates `x` only once"
+prs: 9847
+---
+
+`inherit (x) a b ...` now evaluates the expression `x` only once for all inherited attributes rather than once for each inherited attribute.
+This does not usually have a measurable impact, but side-effects (such as `builtins.trace`) would be duplicated and expensive expressions (such as derivations) could cause a measurable slowdown.
--- a/doc/manual/rl-next/nix-env-json-drv-path.md
+++ b/doc/manual/rl-next/nix-env-json-drv-path.md
@ -0,0 +1,6 @@
+---
+synopsis: Fix `nix-env --query --drv-path --json`
+prs: 9257
+---
+
+Fixed a bug where `nix-env --query` ignored `--drv-path` when `--json` was set.
--- a/doc/manual/rl-next/nix-flake-check-logs-actions.md
+++ b/doc/manual/rl-next/nix-flake-check-logs-actions.md
@ -0,0 +1,33 @@
+---
+synopsis: "`nix flake check` logs the checks"
+issues: 8882
+prs: 8893
+---
+
+`nix flake check` now logs the checks it runs and the derivations it evaluates:
+
+```
+$ nix flake check -v
+evaluating flake...
+checking flake output 'checks'...
+checking derivation 'checks.aarch64-darwin.ghciwatch-tests'...
+derivation evaluated to /nix/store/nh7dlvsrhds4cxl91mvgj4h5cbq6skmq-ghciwatch-test-0.3.0.drv
+checking derivation 'checks.aarch64-darwin.ghciwatch-clippy'...
+derivation evaluated to /nix/store/9cb5a6wmp6kf6hidqw9wphidvb8bshym-ghciwatch-clippy-0.3.0.drv
+checking derivation 'checks.aarch64-darwin.ghciwatch-doc'...
+derivation evaluated to /nix/store/8brdd3jbawfszpbs7vdpsrhy80as1il8-ghciwatch-doc-0.3.0.drv
+checking derivation 'checks.aarch64-darwin.ghciwatch-fmt'...
+derivation evaluated to /nix/store/wjhs0l1njl5pyji53xlmfjrlya0wmz8p-ghciwatch-fmt-0.3.0.drv
+checking derivation 'checks.aarch64-darwin.ghciwatch-audit'...
+derivation evaluated to /nix/store/z0mps8dyj2ds7c0fn0819y5h5611033z-ghciwatch-audit-0.3.0.drv
+checking flake output 'packages'...
+checking derivation 'packages.aarch64-darwin.default'...
+derivation evaluated to /nix/store/41abbdyglw5x9vcsvd89xan3ydjf8d7r-ghciwatch-0.3.0.drv
+checking flake output 'apps'...
+checking flake output 'devShells'...
+checking derivation 'devShells.aarch64-darwin.default'...
+derivation evaluated to /nix/store/bc935gz7dylzmcpdb5cczr8gngv8pmdb-nix-shell.drv
+running 5 flake checks...
+warning: The check omitted these incompatible systems: aarch64-linux, x86_64-darwin, x86_64-linux
+Use '--all-systems' to check all.
+```
--- a/doc/manual/rl-next/print-value-in-coercion-error.md
+++ b/doc/manual/rl-next/print-value-in-coercion-error.md
@ -0,0 +1,24 @@
+---
+synopsis: Coercion errors include the failing value
+issues: #561
+prs: #9754
+---
+
+The `error: cannot coerce a <TYPE> to a string` message now includes the value
+which caused the error.
+
+Before:
+
+```
+       error: cannot coerce a set to a string
+```
+
+After:
+
+```
+       error: cannot coerce a set to a string: { aesSupport = «thunk»;
+       avx2Support = «thunk»; avx512Support = «thunk»; avxSupport = «thunk»;
+       canExecute = «thunk»; config = «thunk»; darwinArch = «thunk»; darwinMinVersion
+       = «thunk»; darwinMinVersionVariable = «thunk»; darwinPlatform = «thunk»; «84
+       attributes elided»}
+```
--- a/doc/manual/rl-next/print-value-in-type-error.md
+++ b/doc/manual/rl-next/print-value-in-type-error.md
@ -0,0 +1,23 @@
+---
+synopsis: Type errors include the failing value
+issues: #561
+prs: #9753
+---
+
+In errors like `value is an integer while a list was expected`, the message now
+includes the failing value.
+
+Before:
+
+```
+       error: value is a set while a string was expected
+```
+
+After:
+
+```
+       error: expected a string but found a set: { ghc810 = «thunk»;
+       ghc8102Binary = «thunk»; ghc8107 = «thunk»; ghc8107Binary = «thunk»;
+       ghc865Binary = «thunk»; ghc90 = «thunk»; ghc902 = «thunk»; ghc92 = «thunk»;
+       ghc924Binary = «thunk»; ghc925 = «thunk»;  «17 attributes elided»}
+```
--- a/doc/manual/rl-next/reduce-debugger-clutter.md
+++ b/doc/manual/rl-next/reduce-debugger-clutter.md
@ -0,0 +1,37 @@
+---
+synopsis: "Visual clutter in `--debugger` is reduced"
+prs: 9919
+---
+
+Before:
+```
+info: breakpoint reached
+
+
+Starting REPL to allow you to inspect the current state of the evaluator.
+
+Welcome to Nix 2.20.0pre20231222_dirty. Type :? for help.
+
+nix-repl> :continue
+error: uh oh
+
+
+Starting REPL to allow you to inspect the current state of the evaluator.
+
+Welcome to Nix 2.20.0pre20231222_dirty. Type :? for help.
+
+nix-repl>
+```
+
+After:
+
+```
+info: breakpoint reached
+
+Nix 2.20.0pre20231222_dirty debugger
+Type :? for help.
+nix-repl> :continue
+error: uh oh
+
+nix-repl>
+```
--- a/doc/manual/rl-next/relative-and-tilde-paths-in-config.md
+++ b/doc/manual/rl-next/relative-and-tilde-paths-in-config.md
@ -1,30 +0,0 @@
---
-synopsis: Relative and tilde paths in configuration
-issues: [fj#482]
-cls: [1851, 1863, 1864]
-category: Features
-credits: [9999years]
---
-
-[Configuration settings](@docroot@/command-ref/conf-file.md) can now refer to
-files with paths relative to the file they're written in or relative to your
-home directory (with `~/`).
-
-This makes settings like
-[`repl-overlays`](@docroot@/command-ref/conf-file.md#conf-repl-overlays) and
-[`secret-key-files`](@docroot@/command-ref/conf-file.md#conf-repl-overlays)
-much easier to set, especially if you'd like to refer to files in an existing
-dotfiles repo cloned into your home directory.
-
-If you put `repl-overlays = repl.nix` in your `~/.config/nix/nix.conf`, it'll
-load `~/.config/nix/repl.nix`. Similarly, you can set `repl-overlays =
-~/.dotfiles/repl.nix` to load a file relative to your home directory.
-
-Configuration files can also
-[`include`](@docroot@/command-ref/conf-file.md#file-format) paths relative to
-your home directory.
-
-Only user configuration files (like `$XDG_CONFIG_HOME/nix/nix.conf` or the
-files listed in `$NIX_USER_CONF_FILES`) can use tilde paths relative to your
-home directory. Configuration listed in the `$NIX_CONFIG` environment variable
-may not use relative paths.
--- a/doc/manual/rl-next/source-location-in-while-evaluating-attribute.md
+++ b/doc/manual/rl-next/source-location-in-while-evaluating-attribute.md
@ -0,0 +1,23 @@
+---
+synopsis: "In the debugger, `while evaluating the attribute` errors now include position information"
+prs: 9915
+---
+
+Before:
+
+```
+0: while evaluating the attribute 'python311.pythonForBuild.pkgs'
+0x600001522598
+```
+
+After:
+
+```
+0: while evaluating the attribute 'python311.pythonForBuild.pkgs'
+/nix/store/hg65h51xnp74ikahns9hyf3py5mlbbqq-source/overrides/default.nix:132:27
+
+   131|
+   132|       bootstrappingBase = pkgs.${self.python.pythonAttr}.pythonForBuild.pkgs;
+      |                           ^
+   133|     in
+```
--- a/doc/manual/rl-next/source-positions-in-errors.md
+++ b/doc/manual/rl-next/source-positions-in-errors.md
@ -0,0 +1,42 @@
+---
+synopsis: Source locations are printed more consistently in errors
+issues: 561
+prs: 9555
+---
+
+Source location information is now included in error messages more
+consistently. Given this code:
+
+```nix
+let
+  attr = {foo = "bar";};
+  key = {};
+in
+  attr.${key}
+```
+
+Previously, Nix would show this unhelpful message when attempting to evaluate
+it:
+
+```
+error:
+       … while evaluating an attribute name
+
+       error: value is a set while a string was expected
+```
+
+Now, the error message displays where the problematic value was found:
+
+```
+error:
+       … while evaluating an attribute name
+
+         at bad.nix:4:11:
+
+            3|   key = {};
+            4| in attr.${key}
+             |           ^
+            5|
+
+       error: expected a string but found a set: { }
+```
--- a/doc/manual/rl-next/stack-overflow-segfaults.md
+++ b/doc/manual/rl-next/stack-overflow-segfaults.md
@ -0,0 +1,32 @@
+---
+synopsis: Some stack overflow segfaults are fixed
+issues: 9616
+prs: 9617
+---
+
+The number of nested function calls has been restricted, to detect and report
+infinite function call recursions. The default maximum call depth is 10,000 and
+can be set with [the `max-call-depth`
+option](@docroot@/command-ref/conf-file.md#conf-max-call-depth).
+
+This fixes segfaults or the following unhelpful error message in many cases:
+
+    error: stack overflow (possible infinite recursion)
+
+Before:
+
+```
+$ nix-instantiate --eval --expr '(x: x x) (x: x x)'
+Segmentation fault: 11
+```
+
+After:
+
+```
+$ nix-instantiate --eval --expr '(x: x x) (x: x x)'
+error: stack overflow
+
+       at «string»:1:14:
+            1| (x: x x) (x: x x)
+             |              ^
+```
--- a/doc/manual/rl-next/with-error-reporting.md
+++ b/doc/manual/rl-next/with-error-reporting.md
@ -0,0 +1,31 @@
+---
+synopsis: Better error reporting for `with` expressions
+prs: 9658
+---
+
+`with` expressions using non-attrset values to resolve variables are now reported with proper positions.
+
+Previously an incorrect `with` expression would report no position at all, making it hard to determine where the error originated:
+
+```
+nix-repl> with 1; a
+error:
+       … <borked>
+
+         at «none»:0: (source not available)
+
+       error: value is an integer while a set was expected
+```
+
+Now position information is preserved and reported as with most other errors:
+
+```
+nix-repl> with 1; a
+error:
+       … while evaluating the first subexpression of a with expression
+         at «string»:1:1:
+            1| with 1; a
+             | ^
+
+       error: expected a set but found an integer: 1
+```
--- a/doc/manual/src/SUMMARY.md
+++ b/doc/manual/src/SUMMARY.md
@ -1,252 +0,0 @@
-# Table of Contents
-
- [Introduction](introduction.md)
- [Quick Start](quick-start.md)
- [Installation](installation/installation.md)
-  - [Supported Platforms](installation/supported-platforms.md)
-  - [Installing a Binary Distribution](installation/installing-binary.md)
-  - [Installing Lix from Source](installation/installing-source.md)
-    - [Prerequisites](installation/prerequisites-source.md)
-    - [Obtaining a Source Distribution](installation/obtaining-source.md)
-    - [Building Lix from Source](installation/building-source.md)
-  - [Using Lix within Docker](installation/installing-docker.md)
-  - [Security](installation/nix-security.md)
-    - [Single-User Mode](installation/single-user.md)
-    - [Multi-User Mode](installation/multi-user.md)
-  - [Environment Variables](installation/env-variables.md)
-  - [Upgrading Lix](installation/upgrading.md)
-  - [Uninstalling Lix](installation/uninstall.md)
- [Package Management](package-management/package-management.md)
-  - [Basic Package Management](package-management/basic-package-mgmt.md)
-  - [Profiles](package-management/profiles.md)
-  - [Garbage Collection](package-management/garbage-collection.md)
-    - [Garbage Collector Roots](package-management/garbage-collector-roots.md)
-  - [Sharing Packages Between Machines](package-management/sharing-packages.md)
-    - [Serving a Nix store via HTTP](package-management/binary-cache-substituter.md)
-    - [Copying Closures via SSH](package-management/copy-closure.md)
-    - [Serving a Nix store via SSH](package-management/ssh-substituter.md)
-    - [Serving a Nix store via S3](package-management/s3-substituter.md)
- [Nix Language](language/index.md)
-  - [Data Types](language/values.md)
-  - [Language Constructs](language/constructs.md)
-    - [String interpolation](language/string-interpolation.md)
-  - [Operators](language/operators.md)
-  - [Derivations](language/derivations.md)
-    - [Advanced Attributes](language/advanced-attributes.md)
-  - [Built-in Constants](language/builtin-constants.md)
-  - [Built-in Functions](language/builtins.md)
- [Advanced Topics](advanced-topics/advanced-topics.md)
-  - [Remote Builds](advanced-topics/distributed-builds.md)
-  - [Tuning Cores and Jobs](advanced-topics/cores-vs-jobs.md)
-  - [Verifying Build Reproducibility](advanced-topics/diff-hook.md)
-  - [Using the `post-build-hook`](advanced-topics/post-build-hook.md)
- [Command Reference](command-ref/command-ref.md)
-  - [Common Options](command-ref/opt-common.md)
-  - [Common Environment Variables](command-ref/env-common.md)
-  - [Main Commands](command-ref/main-commands.md)
-    - [nix-build](command-ref/nix-build.md)
-    - [nix-shell](command-ref/nix-shell.md)
-    - [nix-store](command-ref/nix-store.md)
-      - [nix-store --add-fixed](command-ref/nix-store/add-fixed.md)
-      - [nix-store --add](command-ref/nix-store/add.md)
-      - [nix-store --delete](command-ref/nix-store/delete.md)
-      - [nix-store --dump-db](command-ref/nix-store/dump-db.md)
-      - [nix-store --dump](command-ref/nix-store/dump.md)
-      - [nix-store --export](command-ref/nix-store/export.md)
-      - [nix-store --gc](command-ref/nix-store/gc.md)
-      - [nix-store --generate-binary-cache-key](command-ref/nix-store/generate-binary-cache-key.md)
-      - [nix-store --import](command-ref/nix-store/import.md)
-      - [nix-store --load-db](command-ref/nix-store/load-db.md)
-      - [nix-store --optimise](command-ref/nix-store/optimise.md)
-      - [nix-store --print-env](command-ref/nix-store/print-env.md)
-      - [nix-store --query](command-ref/nix-store/query.md)
-      - [nix-store --read-log](command-ref/nix-store/read-log.md)
-      - [nix-store --realise](command-ref/nix-store/realise.md)
-      - [nix-store --repair-path](command-ref/nix-store/repair-path.md)
-      - [nix-store --restore](command-ref/nix-store/restore.md)
-      - [nix-store --serve](command-ref/nix-store/serve.md)
-      - [nix-store --verify-path](command-ref/nix-store/verify-path.md)
-      - [nix-store --verify](command-ref/nix-store/verify.md)
-    - [nix-env](command-ref/nix-env.md)
-      - [nix-env --delete-generations](command-ref/nix-env/delete-generations.md)
-      - [nix-env --install](command-ref/nix-env/install.md)
-      - [nix-env --list-generations](command-ref/nix-env/list-generations.md)
-      - [nix-env --query](command-ref/nix-env/query.md)
-      - [nix-env --rollback](command-ref/nix-env/rollback.md)
-      - [nix-env --set-flag](command-ref/nix-env/set-flag.md)
-      - [nix-env --set](command-ref/nix-env/set.md)
-      - [nix-env --switch-generation](command-ref/nix-env/switch-generation.md)
-      - [nix-env --switch-profile](command-ref/nix-env/switch-profile.md)
-      - [nix-env --uninstall](command-ref/nix-env/uninstall.md)
-      - [nix-env --upgrade](command-ref/nix-env/upgrade.md)
-  - [Utilities](command-ref/utilities.md)
-    - [nix-channel](command-ref/nix-channel.md)
-    - [nix-collect-garbage](command-ref/nix-collect-garbage.md)
-    - [nix-copy-closure](command-ref/nix-copy-closure.md)
-    - [nix-daemon](command-ref/nix-daemon.md)
-    - [nix-hash](command-ref/nix-hash.md)
-    - [nix-instantiate](command-ref/nix-instantiate.md)
-    - [nix-prefetch-url](command-ref/nix-prefetch-url.md)
-  - [Experimental Commands](command-ref/experimental-commands.md)
-    - [nix](command-ref/new-cli/nix.md)
-    - [nix build](command-ref/new-cli/nix3-build.md)
-    - [nix bundle](command-ref/new-cli/nix3-bundle.md)
-    - [nix config](command-ref/new-cli/nix3-config.md)
-    - [nix config show](command-ref/new-cli/nix3-config-show.md)
-    - [nix copy](command-ref/new-cli/nix3-copy.md)
-    - [nix daemon](command-ref/new-cli/nix3-daemon.md)
-    - [nix derivation](command-ref/new-cli/nix3-derivation.md)
-    - [nix derivation add](command-ref/new-cli/nix3-derivation-add.md)
-    - [nix derivation show](command-ref/new-cli/nix3-derivation-show.md)
-    - [nix develop](command-ref/new-cli/nix3-develop.md)
-    - [nix doctor](command-ref/new-cli/nix3-doctor.md)
-    - [nix edit](command-ref/new-cli/nix3-edit.md)
-    - [nix eval](command-ref/new-cli/nix3-eval.md)
-    - [nix flake](command-ref/new-cli/nix3-flake.md)
-    - [nix flake archive](command-ref/new-cli/nix3-flake-archive.md)
-    - [nix flake check](command-ref/new-cli/nix3-flake-check.md)
-    - [nix flake clone](command-ref/new-cli/nix3-flake-clone.md)
-    - [nix flake info](command-ref/new-cli/nix3-flake-info.md)
-    - [nix flake init](command-ref/new-cli/nix3-flake-init.md)
-    - [nix flake lock](command-ref/new-cli/nix3-flake-lock.md)
-    - [nix flake metadata](command-ref/new-cli/nix3-flake-metadata.md)
-    - [nix flake new](command-ref/new-cli/nix3-flake-new.md)
-    - [nix flake prefetch](command-ref/new-cli/nix3-flake-prefetch.md)
-    - [nix flake show](command-ref/new-cli/nix3-flake-show.md)
-    - [nix flake update](command-ref/new-cli/nix3-flake-update.md)
-    - [nix fmt](command-ref/new-cli/nix3-fmt.md)
-    - [nix hash](command-ref/new-cli/nix3-hash.md)
-    - [nix hash file](command-ref/new-cli/nix3-hash-file.md)
-    - [nix hash path](command-ref/new-cli/nix3-hash-path.md)
-    - [nix hash to-base16](command-ref/new-cli/nix3-hash-to-base16.md)
-    - [nix hash to-base32](command-ref/new-cli/nix3-hash-to-base32.md)
-    - [nix hash to-base64](command-ref/new-cli/nix3-hash-to-base64.md)
-    - [nix hash to-sri](command-ref/new-cli/nix3-hash-to-sri.md)
-    - [nix help](command-ref/new-cli/nix3-help.md)
-    - [nix help-stores](command-ref/new-cli/nix3-help-stores.md)
-    - [nix key](command-ref/new-cli/nix3-key.md)
-    - [nix key convert-secret-to-public](command-ref/new-cli/nix3-key-convert-secret-to-public.md)
-    - [nix key generate-secret](command-ref/new-cli/nix3-key-generate-secret.md)
-    - [nix log](command-ref/new-cli/nix3-log.md)
-    - [nix nar](command-ref/new-cli/nix3-nar.md)
-    - [nix nar cat](command-ref/new-cli/nix3-nar-cat.md)
-    - [nix nar dump-path](command-ref/new-cli/nix3-nar-dump-path.md)
-    - [nix nar ls](command-ref/new-cli/nix3-nar-ls.md)
-    - [nix path-info](command-ref/new-cli/nix3-path-info.md)
-    - [nix print-dev-env](command-ref/new-cli/nix3-print-dev-env.md)
-    - [nix profile](command-ref/new-cli/nix3-profile.md)
-    - [nix profile diff-closures](command-ref/new-cli/nix3-profile-diff-closures.md)
-    - [nix profile history](command-ref/new-cli/nix3-profile-history.md)
-    - [nix profile install](command-ref/new-cli/nix3-profile-install.md)
-    - [nix profile list](command-ref/new-cli/nix3-profile-list.md)
-    - [nix profile remove](command-ref/new-cli/nix3-profile-remove.md)
-    - [nix profile rollback](command-ref/new-cli/nix3-profile-rollback.md)
-    - [nix profile upgrade](command-ref/new-cli/nix3-profile-upgrade.md)
-    - [nix profile wipe-history](command-ref/new-cli/nix3-profile-wipe-history.md)
-    - [nix realisation](command-ref/new-cli/nix3-realisation.md)
-    - [nix realisation info](command-ref/new-cli/nix3-realisation-info.md)
-    - [nix registry](command-ref/new-cli/nix3-registry.md)
-    - [nix registry add](command-ref/new-cli/nix3-registry-add.md)
-    - [nix registry list](command-ref/new-cli/nix3-registry-list.md)
-    - [nix registry pin](command-ref/new-cli/nix3-registry-pin.md)
-    - [nix registry remove](command-ref/new-cli/nix3-registry-remove.md)
-    - [nix repl](command-ref/new-cli/nix3-repl.md)
-    - [nix run](command-ref/new-cli/nix3-run.md)
-    - [nix search](command-ref/new-cli/nix3-search.md)
-    - [nix shell](command-ref/new-cli/nix3-shell.md)
-    - [nix store](command-ref/new-cli/nix3-store.md)
-    - [nix store add-file](command-ref/new-cli/nix3-store-add-file.md)
-    - [nix store add-path](command-ref/new-cli/nix3-store-add-path.md)
-    - [nix store cat](command-ref/new-cli/nix3-store-cat.md)
-    - [nix store copy-log](command-ref/new-cli/nix3-store-copy-log.md)
-    - [nix store copy-sigs](command-ref/new-cli/nix3-store-copy-sigs.md)
-    - [nix store delete](command-ref/new-cli/nix3-store-delete.md)
-    - [nix store diff-closures](command-ref/new-cli/nix3-store-diff-closures.md)
-    - [nix store dump-path](command-ref/new-cli/nix3-store-dump-path.md)
-    - [nix store gc](command-ref/new-cli/nix3-store-gc.md)
-    - [nix store ls](command-ref/new-cli/nix3-store-ls.md)
-    - [nix store make-content-addressed](command-ref/new-cli/nix3-store-make-content-addressed.md)
-    - [nix store optimise](command-ref/new-cli/nix3-store-optimise.md)
-    - [nix store path-from-hash-part](command-ref/new-cli/nix3-store-path-from-hash-part.md)
-    - [nix store ping](command-ref/new-cli/nix3-store-ping.md)
-    - [nix store prefetch-file](command-ref/new-cli/nix3-store-prefetch-file.md)
-    - [nix store repair](command-ref/new-cli/nix3-store-repair.md)
-    - [nix store sign](command-ref/new-cli/nix3-store-sign.md)
-    - [nix store verify](command-ref/new-cli/nix3-store-verify.md)
-    - [nix upgrade-nix](command-ref/new-cli/nix3-upgrade-nix.md)
-    - [nix why-depends](command-ref/new-cli/nix3-why-depends.md)
-  - [Files](command-ref/files.md)
-    - [nix.conf](command-ref/conf-file.md)
-    - [Profiles](command-ref/files/profiles.md)
-      - [manifest.nix](command-ref/files/manifest.nix.md)
-      - [manifest.json](command-ref/files/manifest.json.md)
-    - [Channels](command-ref/files/channels.md)
-    - [Default Nix expression](command-ref/files/default-nix-expression.md)
- [Architecture and Design](architecture/architecture.md)
-  - [File System Object](architecture/file-system-object.md)
- [Protocols](protocols/protocols.md)
-  - [Serving Tarball Flakes](protocols/tarball-fetcher.md)
-  - [Derivation "ATerm" file format](protocols/derivation-aterm.md)
- [Glossary](glossary.md)
- [Contributing](contributing/contributing.md)
-  - [Hacking](contributing/hacking.md)
-  - [Testing](contributing/testing.md)
-  - [Experimental Features](contributing/experimental-features.md)
-  - [Deprecated Features](contributing/deprecated-features.md)
-  - [CLI guideline](contributing/cli-guideline.md)
-  - [C++ style guide](contributing/cxx.md)
- [Release Notes](release-notes/release-notes.md)
-  - [Upcoming release](release-notes/rl-next.md)
-    <!-- RELENG-AUTO-INSERTION-MARKER (see releng/release_notes.py) -->
-  - [Lix 2.91 (2024-08-12)](release-notes/rl-2.91.md)
-  - [Lix 2.90 (2024-07-10)](release-notes/rl-2.90.md)
-  - [Nix 2.18 (2023-09-20)](release-notes/rl-2.18.md)
-  - [Nix 2.17 (2023-07-24)](release-notes/rl-2.17.md)
-  - [Nix 2.16 (2023-05-31)](release-notes/rl-2.16.md)
-  - [Nix 2.15 (2023-04-11)](release-notes/rl-2.15.md)
-  - [Nix 2.14 (2023-02-28)](release-notes/rl-2.14.md)
-  - [Nix 2.13 (2023-01-17)](release-notes/rl-2.13.md)
-  - [Nix 2.12 (2022-12-06)](release-notes/rl-2.12.md)
-  - [Nix 2.11 (2022-08-25)](release-notes/rl-2.11.md)
-  - [Nix 2.10 (2022-07-11)](release-notes/rl-2.10.md)
-  - [Nix 2.9 (2022-05-30)](release-notes/rl-2.9.md)
-  - [Nix 2.8 (2022-04-19)](release-notes/rl-2.8.md)
-  - [Nix 2.7 (2022-03-07)](release-notes/rl-2.7.md)
-  - [Nix 2.6 (2022-01-24)](release-notes/rl-2.6.md)
-  - [Nix 2.5 (2021-12-13)](release-notes/rl-2.5.md)
-  - [Nix 2.4 (2021-11-01)](release-notes/rl-2.4.md)
-  - [Nix 2.3 (2019-09-04)](release-notes/rl-2.3.md)
-  - [Nix 2.2 (2019-01-11)](release-notes/rl-2.2.md)
-  - [Nix 2.1 (2018-09-02)](release-notes/rl-2.1.md)
-  - [Nix 2.0 (2018-02-22)](release-notes/rl-2.0.md)
-  - [Nix 1.11.10 (2017-06-12)](release-notes/rl-1.11.10.md)
-  - [Nix 1.11 (2016-01-19)](release-notes/rl-1.11.md)
-  - [Nix 1.10 (2015-09-03)](release-notes/rl-1.10.md)
-  - [Nix 1.9 (2015-06-12)](release-notes/rl-1.9.md)
-  - [Nix 1.8 (2014-12-14)](release-notes/rl-1.8.md)
-  - [Nix 1.7 (2014-04-11)](release-notes/rl-1.7.md)
-  - [Nix 1.6.1 (2013-10-28)](release-notes/rl-1.6.1.md)
-  - [Nix 1.6 (2013-09-10)](release-notes/rl-1.6.md)
-  - [Nix 1.5.2 (2013-05-13)](release-notes/rl-1.5.2.md)
-  - [Nix 1.5 (2013-02-27)](release-notes/rl-1.5.md)
-  - [Nix 1.4 (2013-02-26)](release-notes/rl-1.4.md)
-  - [Nix 1.3 (2013-01-04)](release-notes/rl-1.3.md)
-  - [Nix 1.2 (2012-12-06)](release-notes/rl-1.2.md)
-  - [Nix 1.1 (2012-07-18)](release-notes/rl-1.1.md)
-  - [Nix 1.0 (2012-05-11)](release-notes/rl-1.0.md)
-  - [Nix 0.16 (2010-08-17)](release-notes/rl-0.16.md)
-  - [Nix 0.15 (2010-03-17)](release-notes/rl-0.15.md)
-  - [Nix 0.14 (2010-02-04)](release-notes/rl-0.14.md)
-  - [Nix 0.13 (2009-11-05)](release-notes/rl-0.13.md)
-  - [Nix 0.12 (2008-11-20)](release-notes/rl-0.12.md)
-  - [Nix 0.11 (2007-12-31)](release-notes/rl-0.11.md)
-  - [Nix 0.10.1 (2006-10-11)](release-notes/rl-0.10.1.md)
-  - [Nix 0.10 (2006-10-06)](release-notes/rl-0.10.md)
-  - [Nix 0.9.2 (2005-09-21)](release-notes/rl-0.9.2.md)
-  - [Nix 0.9.1 (2005-09-20)](release-notes/rl-0.9.1.md)
-  - [Nix 0.9 (2005-09-16)](release-notes/rl-0.9.md)
-  - [Nix 0.8.1 (2005-04-13)](release-notes/rl-0.8.1.md)
-  - [Nix 0.8 (2005-04-11)](release-notes/rl-0.8.md)
-  - [Nix 0.7 (2005-01-12)](release-notes/rl-0.7.md)
-  - [Nix 0.6 (2004-11-14)](release-notes/rl-0.6.md)
-  - [Nix 0.5 and earlier](release-notes/rl-0.5.md)
--- a/doc/manual/src/SUMMARY.md.in
+++ b/doc/manual/src/SUMMARY.md.in
@ -0,0 +1,162 @@
+# Table of Contents
+
+- [Introduction](introduction.md)
+- [Quick Start](quick-start.md)
+- [Installation](installation/installation.md)
+  - [Supported Platforms](installation/supported-platforms.md)
+  - [Installing a Binary Distribution](installation/installing-binary.md)
+  - [Installing Nix from Source](installation/installing-source.md)
+    - [Prerequisites](installation/prerequisites-source.md)
+    - [Obtaining a Source Distribution](installation/obtaining-source.md)
+    - [Building Nix from Source](installation/building-source.md)
+  - [Using Nix within Docker](installation/installing-docker.md)
+  - [Security](installation/nix-security.md)
+    - [Single-User Mode](installation/single-user.md)
+    - [Multi-User Mode](installation/multi-user.md)
+  - [Environment Variables](installation/env-variables.md)
+  - [Upgrading Nix](installation/upgrading.md)
+  - [Uninstalling Nix](installation/uninstall.md)
+- [Package Management](package-management/package-management.md)
+  - [Basic Package Management](package-management/basic-package-mgmt.md)
+  - [Profiles](package-management/profiles.md)
+  - [Garbage Collection](package-management/garbage-collection.md)
+    - [Garbage Collector Roots](package-management/garbage-collector-roots.md)
+  - [Sharing Packages Between Machines](package-management/sharing-packages.md)
+    - [Serving a Nix store via HTTP](package-management/binary-cache-substituter.md)
+    - [Copying Closures via SSH](package-management/copy-closure.md)
+    - [Serving a Nix store via SSH](package-management/ssh-substituter.md)
+    - [Serving a Nix store via S3](package-management/s3-substituter.md)
+- [Nix Language](language/index.md)
+  - [Data Types](language/values.md)
+  - [Language Constructs](language/constructs.md)
+    - [String interpolation](language/string-interpolation.md)
+  - [Operators](language/operators.md)
+  - [Derivations](language/derivations.md)
+    - [Advanced Attributes](language/advanced-attributes.md)
+  - [Built-in Constants](language/builtin-constants.md)
+  - [Built-in Functions](language/builtins.md)
+- [Advanced Topics](advanced-topics/advanced-topics.md)
+  - [Remote Builds](advanced-topics/distributed-builds.md)
+  - [Tuning Cores and Jobs](advanced-topics/cores-vs-jobs.md)
+  - [Verifying Build Reproducibility](advanced-topics/diff-hook.md)
+  - [Using the `post-build-hook`](advanced-topics/post-build-hook.md)
+- [Command Reference](command-ref/command-ref.md)
+  - [Common Options](command-ref/opt-common.md)
+  - [Common Environment Variables](command-ref/env-common.md)
+  - [Main Commands](command-ref/main-commands.md)
+    - [nix-build](command-ref/nix-build.md)
+    - [nix-shell](command-ref/nix-shell.md)
+    - [nix-store](command-ref/nix-store.md)
+      - [nix-store --add-fixed](command-ref/nix-store/add-fixed.md)
+      - [nix-store --add](command-ref/nix-store/add.md)
+      - [nix-store --delete](command-ref/nix-store/delete.md)
+      - [nix-store --dump-db](command-ref/nix-store/dump-db.md)
+      - [nix-store --dump](command-ref/nix-store/dump.md)
+      - [nix-store --export](command-ref/nix-store/export.md)
+      - [nix-store --gc](command-ref/nix-store/gc.md)
+      - [nix-store --generate-binary-cache-key](command-ref/nix-store/generate-binary-cache-key.md)
+      - [nix-store --import](command-ref/nix-store/import.md)
+      - [nix-store --load-db](command-ref/nix-store/load-db.md)
+      - [nix-store --optimise](command-ref/nix-store/optimise.md)
+      - [nix-store --print-env](command-ref/nix-store/print-env.md)
+      - [nix-store --query](command-ref/nix-store/query.md)
+      - [nix-store --read-log](command-ref/nix-store/read-log.md)
+      - [nix-store --realise](command-ref/nix-store/realise.md)
+      - [nix-store --repair-path](command-ref/nix-store/repair-path.md)
+      - [nix-store --restore](command-ref/nix-store/restore.md)
+      - [nix-store --serve](command-ref/nix-store/serve.md)
+      - [nix-store --verify-path](command-ref/nix-store/verify-path.md)
+      - [nix-store --verify](command-ref/nix-store/verify.md)
+    - [nix-env](command-ref/nix-env.md)
+      - [nix-env --delete-generations](command-ref/nix-env/delete-generations.md)
+      - [nix-env --install](command-ref/nix-env/install.md)
+      - [nix-env --list-generations](command-ref/nix-env/list-generations.md)
+      - [nix-env --query](command-ref/nix-env/query.md)
+      - [nix-env --rollback](command-ref/nix-env/rollback.md)
+      - [nix-env --set-flag](command-ref/nix-env/set-flag.md)
+      - [nix-env --set](command-ref/nix-env/set.md)
+      - [nix-env --switch-generation](command-ref/nix-env/switch-generation.md)
+      - [nix-env --switch-profile](command-ref/nix-env/switch-profile.md)
+      - [nix-env --uninstall](command-ref/nix-env/uninstall.md)
+      - [nix-env --upgrade](command-ref/nix-env/upgrade.md)
+  - [Utilities](command-ref/utilities.md)
+    - [nix-channel](command-ref/nix-channel.md)
+    - [nix-collect-garbage](command-ref/nix-collect-garbage.md)
+    - [nix-copy-closure](command-ref/nix-copy-closure.md)
+    - [nix-daemon](command-ref/nix-daemon.md)
+    - [nix-hash](command-ref/nix-hash.md)
+    - [nix-instantiate](command-ref/nix-instantiate.md)
+    - [nix-prefetch-url](command-ref/nix-prefetch-url.md)
+  - [Experimental Commands](command-ref/experimental-commands.md)
+{{#include ./command-ref/new-cli/SUMMARY.md}}
+  - [Files](command-ref/files.md)
+    - [nix.conf](command-ref/conf-file.md)
+    - [Profiles](command-ref/files/profiles.md)
+      - [manifest.nix](command-ref/files/manifest.nix.md)
+      - [manifest.json](command-ref/files/manifest.json.md)
+    - [Channels](command-ref/files/channels.md)
+    - [Default Nix expression](command-ref/files/default-nix-expression.md)
+- [Architecture and Design](architecture/architecture.md)
+  - [File System Object](architecture/file-system-object.md)
+- [Protocols](protocols/protocols.md)
+  - [Serving Tarball Flakes](protocols/tarball-fetcher.md)
+  - [Derivation "ATerm" file format](protocols/derivation-aterm.md)
+- [Glossary](glossary.md)
+- [Contributing](contributing/contributing.md)
+  - [Hacking](contributing/hacking.md)
+  - [Testing](contributing/testing.md)
+  - [Experimental Features](contributing/experimental-features.md)
+  - [CLI guideline](contributing/cli-guideline.md)
+  - [C++ style guide](contributing/cxx.md)
+- [Release Notes](release-notes/release-notes.md)
+{{#include ./SUMMARY-rl-next.md}}
+  - [Release 2.18 (2023-09-20)](release-notes/rl-2.18.md)
+  - [Release 2.17 (2023-07-24)](release-notes/rl-2.17.md)
+  - [Release 2.16 (2023-05-31)](release-notes/rl-2.16.md)
+  - [Release 2.15 (2023-04-11)](release-notes/rl-2.15.md)
+  - [Release 2.14 (2023-02-28)](release-notes/rl-2.14.md)
+  - [Release 2.13 (2023-01-17)](release-notes/rl-2.13.md)
+  - [Release 2.12 (2022-12-06)](release-notes/rl-2.12.md)
+  - [Release 2.11 (2022-08-25)](release-notes/rl-2.11.md)
+  - [Release 2.10 (2022-07-11)](release-notes/rl-2.10.md)
+  - [Release 2.9 (2022-05-30)](release-notes/rl-2.9.md)
+  - [Release 2.8 (2022-04-19)](release-notes/rl-2.8.md)
+  - [Release 2.7 (2022-03-07)](release-notes/rl-2.7.md)
+  - [Release 2.6 (2022-01-24)](release-notes/rl-2.6.md)
+  - [Release 2.5 (2021-12-13)](release-notes/rl-2.5.md)
+  - [Release 2.4 (2021-11-01)](release-notes/rl-2.4.md)
+  - [Release 2.3 (2019-09-04)](release-notes/rl-2.3.md)
+  - [Release 2.2 (2019-01-11)](release-notes/rl-2.2.md)
+  - [Release 2.1 (2018-09-02)](release-notes/rl-2.1.md)
+  - [Release 2.0 (2018-02-22)](release-notes/rl-2.0.md)
+  - [Release 1.11.10 (2017-06-12)](release-notes/rl-1.11.10.md)
+  - [Release 1.11 (2016-01-19)](release-notes/rl-1.11.md)
+  - [Release 1.10 (2015-09-03)](release-notes/rl-1.10.md)
+  - [Release 1.9 (2015-06-12)](release-notes/rl-1.9.md)
+  - [Release 1.8 (2014-12-14)](release-notes/rl-1.8.md)
+  - [Release 1.7 (2014-04-11)](release-notes/rl-1.7.md)
+  - [Release 1.6.1 (2013-10-28)](release-notes/rl-1.6.1.md)
+  - [Release 1.6 (2013-09-10)](release-notes/rl-1.6.md)
+  - [Release 1.5.2 (2013-05-13)](release-notes/rl-1.5.2.md)
+  - [Release 1.5 (2013-02-27)](release-notes/rl-1.5.md)
+  - [Release 1.4 (2013-02-26)](release-notes/rl-1.4.md)
+  - [Release 1.3 (2013-01-04)](release-notes/rl-1.3.md)
+  - [Release 1.2 (2012-12-06)](release-notes/rl-1.2.md)
+  - [Release 1.1 (2012-07-18)](release-notes/rl-1.1.md)
+  - [Release 1.0 (2012-05-11)](release-notes/rl-1.0.md)
+  - [Release 0.16 (2010-08-17)](release-notes/rl-0.16.md)
+  - [Release 0.15 (2010-03-17)](release-notes/rl-0.15.md)
+  - [Release 0.14 (2010-02-04)](release-notes/rl-0.14.md)
+  - [Release 0.13 (2009-11-05)](release-notes/rl-0.13.md)
+  - [Release 0.12 (2008-11-20)](release-notes/rl-0.12.md)
+  - [Release 0.11 (2007-12-31)](release-notes/rl-0.11.md)
+  - [Release 0.10.1 (2006-10-11)](release-notes/rl-0.10.1.md)
+  - [Release 0.10 (2006-10-06)](release-notes/rl-0.10.md)
+  - [Release 0.9.2 (2005-09-21)](release-notes/rl-0.9.2.md)
+  - [Release 0.9.1 (2005-09-20)](release-notes/rl-0.9.1.md)
+  - [Release 0.9 (2005-09-16)](release-notes/rl-0.9.md)
+  - [Release 0.8.1 (2005-04-13)](release-notes/rl-0.8.1.md)
+  - [Release 0.8 (2005-04-11)](release-notes/rl-0.8.md)
+  - [Release 0.7 (2005-01-12)](release-notes/rl-0.7.md)
+  - [Release 0.6 (2004-11-14)](release-notes/rl-0.6.md)
+  - [Release 0.5 and earlier](release-notes/rl-0.5.md)
--- a/doc/manual/src/_redirects
+++ b/doc/manual/src/_redirects
@ -27,3 +27,4 @@
 /package-management/channels* /command-ref/nix-channel 301!

 /package-management/s3-substituter* /command-ref/new-cli/nix3-help-stores#s3-binary-cache-store 301!
+
--- a/doc/manual/src/advanced-topics/cores-vs-jobs.md
+++ b/doc/manual/src/advanced-topics/cores-vs-jobs.md
@ -1,13 +1,13 @@
 # Tuning Cores and Jobs

-Lix has two relevant settings with regards to how your CPU cores will
+Nix has two relevant settings with regards to how your CPU cores will
 be utilized: `cores` and `max-jobs`. This chapter will talk about what
 they are, how they interact, and their configuration trade-offs.

  - `max-jobs`\
    Dictates how many separate derivations will be built at the same
    time. If you set this to zero, the local machine will do no
-    builds.  Lix will still substitute from binary caches, and build
+    builds.  Nix will still substitute from binary caches, and build
    remotely if remote builders are configured.

  - `cores`\
--- a/doc/manual/src/advanced-topics/diff-hook.md
+++ b/doc/manual/src/advanced-topics/diff-hook.md
@ -1,6 +1,6 @@
 # Verifying Build Reproducibility

-You can use Lix's `diff-hook` setting to compare build results. Note
+You can use Nix's `diff-hook` setting to compare build results. Note
 that this hook is only executed if the results differ; it is not used
 for determining if the results are the same.

@ -44,7 +44,7 @@ built.
 Verify a path which already exists in the Nix store by passing `--check`
 to the build command.

-If the build passes and is deterministic, Lix will exit with a status
+If the build passes and is deterministic, Nix will exit with a status
 code of 0:

 ```console
@ -59,7 +59,7 @@ checking outputs of '/nix/store/z98fasz2jqy9gs0xbvdj939p27jwda38-stable.drv'...
 /nix/store/yyxlzw3vqaas7wfp04g0b1xg51f2czgq-stable
 ```

-If the build is not deterministic, Lix will exit with a status code of
+If the build is not deterministic, Nix will exit with a status code of
 1:

 ```console
@ -75,7 +75,7 @@ error: derivation '/nix/store/cgl13lbj1w368r5z8gywipl1ifli7dhk-unstable.drv' may
 not be deterministic: output '/nix/store/krpqk0l9ib0ibi1d2w52z293zw455cap-unstable' differs
 ```

-In the Lix daemon's log, we will now see:
+In the Nix daemon's log, we will now see:

 ```
 For derivation /nix/store/cgl13lbj1w368r5z8gywipl1ifli7dhk-unstable.drv:
@ -85,7 +85,7 @@ For derivation /nix/store/cgl13lbj1w368r5z8gywipl1ifli7dhk-unstable.drv:
 > 30204
 ```

-Using `--check` with `--keep-failed` will cause Lix to keep the second
+Using `--check` with `--keep-failed` will cause Nix to keep the second
 build's output in a special, `.check` path:

 ```console
@ -98,7 +98,7 @@ from '/nix/store/krpqk0l9ib0ibi1d2w52z293zw455cap-unstable.check'
 ```

 In particular, notice the
-`/nix/store/krpqk0l9ib0ibi1d2w52z293zw455cap-unstable.check` output. Lix
+`/nix/store/krpqk0l9ib0ibi1d2w52z293zw455cap-unstable.check` output. Nix
 has copied the build results to that directory where you can examine it.

 > []{#check-dirs-are-unregistered} **Note**
@ -114,7 +114,7 @@ has copied the build results to that directory where you can examine it.
 > build was not deterministic and also a check path does not exist.

 `--check` is only usable if the derivation has been built on the system
-already. If the derivation has not been built Lix will fail with the
+already. If the derivation has not been built Nix will fail with the
 error:

    error: some outputs of '/nix/store/hzi1h60z2qf0nb85iwnpvrai3j2w7rr6-unstable.drv' 
--- a/doc/manual/src/advanced-topics/distributed-builds.md
+++ b/doc/manual/src/advanced-topics/distributed-builds.md
@ -1,10 +1,10 @@
 # Remote Builds

-Lix supports remote builds, where a local Lix installation can forward
+Nix supports remote builds, where a local Nix installation can forward
 Nix builds to other machines. This allows multiple builds to be
-performed in parallel and allows Lix to perform multi-platform builds in
+performed in parallel and allows Nix to perform multi-platform builds in
 a semi-transparent way. For instance, if you perform a build for a
-`x86_64-darwin` on an `i686-linux` machine, Lix can automatically
+`x86_64-darwin` on an `i686-linux` machine, Nix can automatically
 forward the build to a `x86_64-darwin` machine, if available.

 To forward a build to a remote machine, it’s required that the remote
@ -38,15 +38,12 @@ contains Nix.

 > **Warning**
 >
-> If you are building via the Lix daemon (default on Linux and macOS), it is the Lix daemon user account (that is, `root`) that should have SSH access to a user (not necessarily `root`) on the remote machine.
->
-> Furthermore, `root` needs to have the public host keys for the remote system in its `.ssh/known_hosts`.
-> To add them to `known_hosts` for root, do `ssh-keyscan USER@HOST | sudo tee -a ~root/.ssh/known_hosts`.
+> If you are building via the Nix daemon, it is the Nix daemon user account (that is, `root`) that should have SSH access to a user (not necessarily `root`) on the remote machine.
 >
 > If you can’t or don’t want to configure `root` to be able to access the remote machine, you can use a private Nix store instead by passing e.g. `--store ~/my-nix` when running a Nix command from the local machine.

 The list of remote machines can be specified on the command line or in
-the Lix configuration file. The former is convenient for testing. For
+the Nix configuration file. The former is convenient for testing. For
 example, the following command allows you to build a derivation for
 `x86_64-darwin` on a Linux machine:

@ -87,17 +84,17 @@ default, set it to `-`.
 3.  The SSH identity file to be used to log in to the remote machine. If
    omitted, SSH will use its regular identities.

-4.  The maximum number of builds that Lix will execute in parallel on
+4.  The maximum number of builds that Nix will execute in parallel on
    the machine. Typically this should be equal to the number of CPU
    cores. For instance, the machine `itchy` in the example will execute
    up to 8 builds in parallel.

 5.  The “speed factor”, indicating the relative speed of the machine. If
-    there are multiple machines of the right type, Lix will prefer the
+    there are multiple machines of the right type, Nix will prefer the
    fastest, taking load into account.

 6.  A comma-separated list of *supported features*. If a derivation has
-    the `requiredSystemFeatures` attribute, then Lix will only perform
+    the `requiredSystemFeatures` attribute, then Nix will only perform
    the derivation on a machine that has the specified features. For
    instance, the attribute

--- a/doc/manual/src/advanced-topics/post-build-hook.md
+++ b/doc/manual/src/advanced-topics/post-build-hook.md
@ -8,7 +8,7 @@ simple and working example, but it is not suitable for all use cases.
 The post build hook program runs after each executed build, and blocks
 the build loop. The build loop exits if the hook program fails.

-Concretely, this implementation will make Lix slow or unusable when the
+Concretely, this implementation will make Nix slow or unusable when the
 internet is slow or unreliable.

 A more advanced implementation might pass the store paths to a
@ -76,7 +76,7 @@ Then make sure the hook program is executable by the `root` user:
 # chmod +x /etc/nix/upload-to-cache.sh
 ```

-# Updating Lix Configuration
+# Updating Nix Configuration

 Edit `/etc/nix/nix.conf` to run our hook, by adding the following
 configuration snippet at the end:
@ -119,7 +119,7 @@ warning: you did not specify '--add-root'; the result might be removed by the ga

 # Conclusion

-We now have a Lix installation configured to automatically sign and
+We now have a Nix installation configured to automatically sign and
 upload every local build to a remote binary cache.

 Before deploying this to production, be sure to consider the
--- a/doc/manual/src/architecture/architecture.md
+++ b/doc/manual/src/architecture/architecture.md
@ -1,7 +1,7 @@
 # Architecture

 This chapter describes how Nix works.
-It should help users understand why Lix behaves as it does, and it should help developers understand how to modify Lix and how to write similar tools.
+It should help users understand why Nix behaves as it does, and it should help developers understand how to modify Nix and how to write similar tools.

 ## Overview

@ -21,8 +21,8 @@ The following [concept map] shows its main components (rectangles), the objects
           |              passed to
           |                   |
 +----------|-------------------|--------------------------------+
-| Nix impl.|                   V                                |
-| (Lix)    |      +-------------------------+                   |
+| Nix      |                   V                                |
+|          |      +-------------------------+                   |
 |          |      | commmand line interface |------.            |
 |          |      +-------------------------+      |            |
 |          |                   |                   |            |
@ -112,3 +112,4 @@ Build inputs used as instructions to a build task are marked accordingly:
 |                                                                    |
 +--------------------------------------------------------------------+
 ```
+
--- a/doc/manual/src/architecture/file-system-object.md
+++ b/doc/manual/src/architecture/file-system-object.md
@ -1,6 +1,6 @@
 # File System Object

-Nix implementations use a simplified model of the file system, which consists of file system objects.
+Nix uses a simplified model of the file system, which consists of file system objects.
 Every file system object is one of the following:

 - File
@ -15,7 +15,7 @@ Every file system object is one of the following:
 - [Symbolic link](https://en.m.wikipedia.org/wiki/Symbolic_link)

   An arbitrary string.
-   Nix implementations do not assign any semantics to symbolic links.
+   Nix does not assign any semantics to symbolic links.

 File system objects and their children form a tree.
 A bare file or symlink can be a root file system object.
--- a/doc/manual/src/command-ref/command-ref.md
+++ b/doc/manual/src/command-ref/command-ref.md
@ -1,2 +1,2 @@
 This section lists commands and options that you can use when you work
-with Lix.
+with Nix.
--- a/doc/manual/src/command-ref/conf-file-prefix.md
+++ b/doc/manual/src/command-ref/conf-file-prefix.md
@ -1,14 +1,14 @@
 # Name

-`nix.conf` - Lix configuration file
+`nix.conf` - Nix configuration file

 # Description

-Lix supports a variety of configuration settings, which are read from configuration files or taken as command line flags.
+Nix supports a variety of configuration settings, which are read from configuration files or taken as command line flags.

 ## Configuration file

-By default Lix reads settings from the following places, in that order:
+By default Nix reads settings from the following places, in that order:

 1. The system-wide configuration file `sysconfdir/nix/nix.conf` (i.e. `/etc/nix/nix.conf` on most systems), or `$NIX_CONF_DIR/nix.conf` if [`NIX_CONF_DIR`](./env-common.md#env-NIX_CONF_DIR) is set.

@ -17,7 +17,7 @@ By default Lix reads settings from the following places, in that order:

 1. If [`NIX_USER_CONF_FILES`](./env-common.md#env-NIX_USER_CONF_FILES) is set, then each path separated by `:` will be loaded in reverse order.

-   Otherwise it will look for `nix/nix.conf` files in `XDG_CONFIG_DIRS` and `XDG_CONFIG_HOME`.
+   Otherwise it will look for `nix/nix.conf` files in `XDG_CONFIG_DIRS` and [`XDG_CONFIG_HOME`](./env-common.md#env-XDG_CONFIG_HOME).
   If unset, `XDG_CONFIG_DIRS` defaults to `/etc/xdg`, and `XDG_CONFIG_HOME` defaults to `$HOME/.config` as per [XDG Base Directory Specification](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html).

 1. If [`NIX_CONFIG`](./env-common.md#env-NIX_CONFIG) is set, its contents are treated as the contents of a configuration file.
@ -68,4 +68,3 @@ The `extra-` prefix is supported for settings that take a list of items (e.g. `-

 # Available settings

-{{#include @generated@/command-ref/conf-file.md}}
--- a/doc/manual/src/command-ref/env-common.md
+++ b/doc/manual/src/command-ref/env-common.md
@ -1,6 +1,6 @@
 # Common Environment Variables

-Most commands in Lix interpret the following environment variables:
+Most Nix commands interpret the following environment variables:

  - <span id="env-IN_NIX_SHELL">[`IN_NIX_SHELL`](#env-IN_NIX_SHELL)</span>\
    Indicator that tells if the current environment was set up by
@ -13,7 +13,7 @@ Most commands in Lix interpret the following environment variables:
    e.g. `/home/eelco/Dev:/etc/nixos`. It can be extended using the
    [`-I` option](@docroot@/command-ref/opt-common.md#opt-I).

-    If `NIX_PATH` is not set at all, Lix will fall back to the following list in [impure](@docroot@/command-ref/conf-file.md#conf-pure-eval) and [unrestricted](@docroot@/command-ref/conf-file.md#conf-restrict-eval) evaluation mode:
+    If `NIX_PATH` is not set at all, Nix will fall back to the following list in [impure](@docroot@/command-ref/conf-file.md#conf-pure-eval) and [unrestricted](@docroot@/command-ref/conf-file.md#conf-restrict-eval) evaluation mode:

      1. `$HOME/.nix-defexpr/channels`
      2. `nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixpkgs`
@ -50,28 +50,28 @@ Most commands in Lix interpret the following environment variables:
    Overrides the location of the Nix store (default `prefix/store`).

  - <span id="env-NIX_DATA_DIR">[`NIX_DATA_DIR`](#env-NIX_DATA_DIR)</span>\
-    Overrides the location of the Lix static data directory (default
+    Overrides the location of the Nix static data directory (default
    `prefix/share`).

  - <span id="env-NIX_LOG_DIR">[`NIX_LOG_DIR`](#env-NIX_LOG_DIR)</span>\
-    Overrides the location of the Lix log directory (default
+    Overrides the location of the Nix log directory (default
    `prefix/var/log/nix`).

  - <span id="env-NIX_STATE_DIR">[`NIX_STATE_DIR`](#env-NIX_STATE_DIR)</span>\
-    Overrides the location of the Lix state directory (default
+    Overrides the location of the Nix state directory (default
    `prefix/var/nix`).

  - <span id="env-NIX_CONF_DIR">[`NIX_CONF_DIR`](#env-NIX_CONF_DIR)</span>\
-    Overrides the location of the system Lix configuration directory
+    Overrides the location of the system Nix configuration directory
    (default `prefix/etc/nix`).

  - <span id="env-NIX_CONFIG">[`NIX_CONFIG`](#env-NIX_CONFIG)</span>\
-    Applies settings from Lix configuration from the environment.
-    The content is treated as if it was read from a Lix configuration file.
+    Applies settings from Nix configuration from the environment.
+    The content is treated as if it was read from a Nix configuration file.
    Settings are separated by the newline character.

  - <span id="env-NIX_USER_CONF_FILES">[`NIX_USER_CONF_FILES`](#env-NIX_USER_CONF_FILES)</span>\
-    Overrides the location of the Lix user configuration files to load from.
+    Overrides the location of the Nix user configuration files to load from.

    The default are the locations according to the [XDG Base Directory Specification].
    See the [XDG Base Directories](#xdg-base-directories) sub-section for details.
@ -84,19 +84,19 @@ Most commands in Lix interpret the following environment variables:
    substantial amounts of disk space. The default is `/tmp`.

  - <span id="env-NIX_REMOTE">[`NIX_REMOTE`](#env-NIX_REMOTE)</span>\
-    This variable should be set to `daemon` if you want to use the Lix
+    This variable should be set to `daemon` if you want to use the Nix
    daemon to execute Nix operations. This is necessary in [multi-user
-    Nix installations](@docroot@/installation/multi-user.md). If the Lix
+    Nix installations](@docroot@/installation/multi-user.md). If the Nix
    daemon's Unix socket is at some non-standard path, this variable
    should be set to `unix://path/to/socket`. Otherwise, it should be
    left unset.

  - <span id="env-NIX_SHOW_STATS">[`NIX_SHOW_STATS`](#env-NIX_SHOW_STATS)</span>\
-    If set to `1`, Lix will print some evaluation statistics, such as
+    If set to `1`, Nix will print some evaluation statistics, such as
    the number of values allocated.

  - <span id="env-NIX_COUNT_CALLS">[`NIX_COUNT_CALLS`](#env-NIX_COUNT_CALLS)</span>\
-    If set to `1`, Lix will print how often functions were called during
+    If set to `1`, Nix will print how often functions were called during
    Nix expression evaluation. This is useful for profiling your Nix
    expressions.

@ -108,16 +108,16 @@ Most commands in Lix interpret the following environment variables:

 ## XDG Base Directories

-Lix follows the [XDG Base Directory Specification].
+Nix follows the [XDG Base Directory Specification].

-For backwards compatibility, commands in Lix will follow the standard only when [`use-xdg-base-directories`] is enabled.
+For backwards compatibility, Nix commands will follow the standard only when [`use-xdg-base-directories`] is enabled.
 [New Nix commands](@docroot@/command-ref/new-cli/nix.md) (experimental) conform to the standard by default.

 The following environment variables are used to determine locations of various state and configuration files:

- `XDG_CONFIG_HOME` (default `~/.config`)
- `XDG_STATE_HOME` (default `~/.local/state`)
- `XDG_CACHE_HOME` (default `~/.cache`)
+- [`XDG_CONFIG_HOME`]{#env-XDG_CONFIG_HOME} (default `~/.config`)
+- [`XDG_STATE_HOME`]{#env-XDG_STATE_HOME} (default `~/.local/state`)
+- [`XDG_CACHE_HOME`]{#env-XDG_CACHE_HOME} (default `~/.cache`)


 [XDG Base Directory Specification]: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
--- a/doc/manual/src/command-ref/files.md
+++ b/doc/manual/src/command-ref/files.md
@ -1,4 +1,4 @@
 # Files

 This section lists configuration files that you can use when you work
-with Lix.
+with Nix.
--- a/Show more
+++ b/Show more
				`@ -1 +0,0 @@`
				`This is a file used by the dev shell shellHook in package.nix to check that this is actually a Lix repo before installing git hooks. Its contents have no meaning.`