Merge pull request #83518 from obsidiansystems/add-tensorflow-2

python.pkgs.{tensorflow,tensorflow-estimator,tensorflow-tensorboard}-2: Init at 2.0.0
2020-03-30 13:40:43 -04:00 · 2020-03-30 13:40:43 -04:00 · 35ac8ba492
commit 35ac8ba492
parent 58a4c2dbff 1fa310549c
23 changed files with 1898 additions and 20 deletions
--- a/pkgs/development/python-modules/tensorflow-estimator/1/default.nix
+++ b/pkgs/development/python-modules/tensorflow-estimator/1/default.nix
--- a/pkgs/development/python-modules/tensorflow-estimator/2/default.nix
+++ b/pkgs/development/python-modules/tensorflow-estimator/2/default.nix
--- a/pkgs/development/python-modules/tensorflow-probability/default.nix
+++ b/pkgs/development/python-modules/tensorflow-probability/default.nix
@ -42,7 +42,7 @@ let
    bazelTarget = ":pip_pkg";

    fetchAttrs = {
-      sha256 = "0135nxxvkmjzpd80r1g9fdkk9h62g0xlvp32g5zgk0hkma5kq0bx";
+      sha256 = "0sjjj9z1dhilhpc8pq4154czrb79z9cm044jvn75kxcjv6v5l2m5";
    };

    buildAttrs = {
--- a/pkgs/development/python-modules/tensorflow-tensorboard/1/default.nix
+++ b/pkgs/development/python-modules/tensorflow-tensorboard/1/default.nix
@ -0,0 +1,66 @@
+{ lib, fetchPypi, buildPythonPackage, isPy3k
+, numpy
+, wheel
+, werkzeug
+, protobuf
+, grpcio
+, markdown
+, futures
+, absl-py
+}:
+
+# tensorflow/tensorboard is built from a downloaded wheel, because
+# https://github.com/tensorflow/tensorboard/issues/719 blocks
+# buildBazelPackage.
+
+buildPythonPackage rec {
+  pname = "tensorflow-tensorboard";
+  version = "1.15.0";
+  format = "wheel";
+
+  src = fetchPypi ({
+    pname = "tensorboard";
+    inherit version;
+    format = "wheel";
+  } // (if isPy3k then {
+    python = "py3";
+    sha256 = "1g62i3nrgp8q9wfsyqqjkkfnsz7x2k018c26kdh527h1yrjjrbac";
+  } else {
+    python = "py2";
+    sha256 = "0l3zc8j2sh7h1z4qpy8kfvclv3kzndri55p10i42q6xahs9phav1";
+  }));
+
+  propagatedBuildInputs = [
+    numpy
+    werkzeug
+    protobuf
+    markdown
+    grpcio
+    absl-py
+    # not declared in install_requires, but used at runtime
+    # https://github.com/NixOS/nixpkgs/issues/73840
+    wheel
+  ] ++ lib.optional (!isPy3k) futures;
+
+  # in the absence of a real test suite, run cli and imports
+  checkPhase = ''
+    $out/bin/tensorboard --help > /dev/null
+  '';
+
+  pythonImportsCheck = [
+    "tensorboard"
+    "tensorboard.backend"
+    "tensorboard.compat"
+    "tensorboard.data"
+    "tensorboard.plugins"
+    "tensorboard.summary"
+    "tensorboard.util"
+  ];
+
+  meta = with lib; {
+    description = "TensorFlow's Visualization Toolkit";
+    homepage = http://tensorflow.org;
+    license = licenses.asl20;
+    maintainers = with maintainers; [ abbradar ];
+  };
+}
--- a/pkgs/development/python-modules/tensorflow-tensorboard/2/default.nix
+++ b/pkgs/development/python-modules/tensorflow-tensorboard/2/default.nix
--- a/pkgs/development/python-modules/tensorflow/1/bin.nix
+++ b/pkgs/development/python-modules/tensorflow/1/bin.nix
@ -0,0 +1,121 @@
+{ stdenv
+, lib
+, fetchurl
+, buildPythonPackage
+, isPy3k, pythonOlder, isPy38
+, astor
+, gast
+, google-pasta
+, wrapt
+, numpy
+, six
+, termcolor
+, protobuf
+, absl-py
+, grpcio
+, mock
+, backports_weakref
+, tensorflow-estimator_1
+, tensorflow-tensorboard
+, cudaSupport ? false
+, cudatoolkit ? null
+, cudnn ? null
+, nvidia_x11 ? null
+, zlib
+, python
+, symlinkJoin
+, keras-applications
+, keras-preprocessing
+, addOpenGLRunpath
+}:
+
+# We keep this binary build for two reasons:
+# - the source build doesn't work on Darwin.
+# - the source build is currently brittle and not easy to maintain
+
+assert cudaSupport -> cudatoolkit != null
+                   && cudnn != null
+                   && nvidia_x11 != null;
+
+# unsupported combination
+assert ! (stdenv.isDarwin && cudaSupport);
+
+let
+  packages = import ./binary-hashes.nix;
+
+  variant = if cudaSupport then "-gpu" else "";
+  pname = "tensorflow${variant}";
+
+in buildPythonPackage {
+  inherit pname;
+  inherit (packages) version;
+  format = "wheel";
+
+  disabled = isPy38;
+
+  src = let
+    pyVerNoDot = lib.strings.stringAsChars (x: if x == "." then "" else x) python.pythonVersion;
+    pyver = if stdenv.isDarwin then builtins.substring 0 1 pyVerNoDot else pyVerNoDot;
+    platform = if stdenv.isDarwin then "mac" else "linux";
+    unit = if cudaSupport then "gpu" else "cpu";
+    key = "${platform}_py_${pyver}_${unit}";
+  in fetchurl packages.${key};
+
+  propagatedBuildInputs = [
+    protobuf
+    numpy
+    termcolor
+    grpcio
+    six
+    astor
+    absl-py
+    gast
+    google-pasta
+    wrapt
+    tensorflow-estimator_1
+    tensorflow-tensorboard
+    keras-applications
+    keras-preprocessing
+  ] ++ lib.optional (!isPy3k) mock
+    ++ lib.optionals (pythonOlder "3.4") [ backports_weakref ];
+
+  nativeBuildInputs = lib.optional cudaSupport addOpenGLRunpath;
+
+  # Upstream has a pip hack that results in bin/tensorboard being in both tensorflow
+  # and the propageted input tensorflow-tensorboard which causes environment collisions.
+  # another possibility would be to have tensorboard only in the buildInputs
+  # https://github.com/tensorflow/tensorflow/blob/v1.7.1/tensorflow/tools/pip_package/setup.py#L79
+  postInstall = ''
+    rm $out/bin/tensorboard
+  '';
+
+  # Note that we need to run *after* the fixup phase because the
+  # libraries are loaded at runtime. If we run in preFixup then
+  # patchelf --shrink-rpath will remove the cuda libraries.
+  postFixup = let
+    rpath = stdenv.lib.makeLibraryPath
+      ([ stdenv.cc.cc.lib zlib ] ++ lib.optionals cudaSupport [ cudatoolkit.out cudatoolkit.lib cudnn nvidia_x11 ]);
+  in
+  lib.optionalString stdenv.isLinux ''
+    rrPath="$out/${python.sitePackages}/tensorflow/:$out/${python.sitePackages}/tensorflow/contrib/tensor_forest/:${rpath}"
+    internalLibPath="$out/${python.sitePackages}/tensorflow/python/_pywrap_tensorflow_internal.so"
+    find $out -type f \( -name '*.so' -or -name '*.so.*' \) | while read lib; do
+      patchelf --set-rpath "$rrPath" "$lib"
+      ${lib.optionalString cudaSupport ''
+        addOpenGLRunpath "$lib"
+      ''}
+    done
+  '';
+
+
+  meta = with stdenv.lib; {
+    description = "Computation using data flow graphs for scalable machine learning";
+    homepage = http://tensorflow.org;
+    license = licenses.asl20;
+    maintainers = with maintainers; [ jyp abbradar ];
+    platforms = [ "x86_64-linux" "x86_64-darwin" ];
+    # Python 2.7 build uses different string encoding.
+    # See https://github.com/NixOS/nixpkgs/pull/37044#issuecomment-373452253
+    broken = stdenv.isDarwin && !isPy3k;
+  };
+}
--- a/pkgs/development/python-modules/tensorflow/1/binary-hashes.nix
+++ b/pkgs/development/python-modules/tensorflow/1/binary-hashes.nix
@ -0,0 +1,43 @@
+{
+version = "1.14.0";
+linux_py_27_cpu = {
+  url = "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.14.0-cp27-none-linux_x86_64.whl";
+  sha256 = "0yywdrfk97dh1bxhibspg0raz70fx9lcczj6xlimqy4xb60clx7k";
+};
+linux_py_35_cpu = {
+  url = "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.14.0-cp35-cp35m-linux_x86_64.whl";
+  sha256 = "1xvyb6xcrjhlwvrmrhn5vs9xy7g98smqmpv4i3hhpry4qyasphhj";
+};
+linux_py_36_cpu = {
+  url = "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.14.0-cp36-cp36m-linux_x86_64.whl";
+  sha256 = "1psd9vyxz9f39dwj77nvrg373sxv3p5vdp9fnz81dpsm0b0mwl44";
+};
+linux_py_37_cpu = {
+  url = "https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-1.14.0-cp37-cp37m-linux_x86_64.whl";
+  sha256 = "0bg2sb1n2ag27r7ww695kg5hb0mjrw4kc5893krmixx2j71860c5";
+};
+linux_py_27_gpu = {
+  url = "https://storage.googleapis.com/tensorflow/linux/gpu/tensorflow_gpu-1.14.0-cp27-none-linux_x86_64.whl";
+  sha256 = "0y1x91gayg6pjddgl8ndcm63wfzhyv4s5khgl7ffzsgni1ivaqw5";
+};
+linux_py_35_gpu = {
+  url = "https://storage.googleapis.com/tensorflow/linux/gpu/tensorflow_gpu-1.14.0-cp35-cp35m-linux_x86_64.whl";
+  sha256 = "03piggpbz1jx8m2b95spq3jrdff4w6xx63ji07am7hyw2nsgx3mx";
+};
+linux_py_36_gpu = {
+  url = "https://storage.googleapis.com/tensorflow/linux/gpu/tensorflow_gpu-1.14.0-cp36-cp36m-linux_x86_64.whl";
+  sha256 = "0ypkp8cfhharsyyikb1qgf44cfm6284km9xswzvzymjzz75vg3gd";
+};
+linux_py_37_gpu = {
+  url = "https://storage.googleapis.com/tensorflow/linux/gpu/tensorflow_gpu-1.14.0-cp37-cp37m-linux_x86_64.whl";
+  sha256 = "0virp8nn2ysx4855hq29kas6fm6b3dsiybwzdxy9nnb9n2d8qlm2";
+};
+mac_py_2_cpu = {
+  url = "https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-1.14.0-py2-none-any.whl";
+  sha256 = "14f86k3pgq7z6i4s4im55zpp38f0drnm7xlclavsgcc0nxnj3z26";
+};
+mac_py_3_cpu = {
+  url = "https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-1.14.0-py3-none-any.whl";
+  sha256 = "0f3swpcjfgqhj6h5wnx8snc0xjkx4hnkqx83fmlrwpncs8c131d3";
+};
+}
--- a/pkgs/development/python-modules/tensorflow/1/default.nix
+++ b/pkgs/development/python-modules/tensorflow/1/default.nix
@ -1,13 +1,13 @@
-{ stdenv, pkgs, bazel_0, buildBazelPackage, lib, fetchFromGitHub, fetchpatch, symlinkJoin
+{ stdenv, pkgs, bazel_0_26, buildBazelPackage, lib, fetchFromGitHub, fetchpatch, symlinkJoin
 , addOpenGLRunpath
 # Python deps
 , buildPythonPackage, isPy3k, isPy27, pythonOlder, pythonAtLeast, python
 # Python libraries
-, numpy, tensorflow-tensorboard, backports_weakref, mock, enum34, absl-py
+, numpy, tensorflow-tensorboard_1, backports_weakref, mock, enum34, absl-py
 , future, setuptools, wheel, keras-preprocessing, keras-applications, google-pasta
 , functools32
 , opt-einsum
-, termcolor, grpcio, six, wrapt, protobuf, tensorflow-estimator_1_15_1
+, termcolor, grpcio, six, wrapt, protobuf, tensorflow-estimator_1
 # Common deps
 , git, swig, which, binutils, glibcLocales, cython
 # Common libraries
@ -94,7 +94,7 @@ let

  bazel-build = buildBazelPackage {
    name = "${pname}-${version}";
-    bazel = bazel_0;
+    bazel = bazel_0_26;

    src = fetchFromGitHub {
      owner = "tensorflow";
@ -105,9 +105,9 @@ let

    patches = [
      # Work around https://github.com/tensorflow/tensorflow/issues/24752
-      ./no-saved-proto.patch
+      ../no-saved-proto.patch
      # Fixes for NixOS jsoncpp
-      ./system-jsoncpp.patch
+      ../system-jsoncpp.patch

      # https://github.com/tensorflow/tensorflow/pull/29673
      (fetchpatch {
@ -121,7 +121,6 @@ let
        sha256 = "1n9ypbrx36fc1kc9cz5b3p9qhg15xxhq4nz6ap3hwqba535nakfz";
      })

-
      (fetchpatch {
        # be compatible with gast >0.2 instead of only gast 0.2.2
        name = "gast-update.patch";
@ -132,7 +131,7 @@ let

      # cuda 10.2 does not have "-bin2c-path" option anymore
      # https://github.com/tensorflow/tensorflow/issues/34429
-      ./cuda-10.2-no-bin2c-path.patch
+      ../cuda-10.2-no-bin2c-path.patch
    ];

    # On update, it can be useful to steal the changes from gentoo
@ -373,7 +372,7 @@ in buildPythonPackage {
    numpy
    six
    protobuf
-    tensorflow-estimator_1_15_1
+    tensorflow-estimator_1
    termcolor
    wrapt
    grpcio
@ -385,7 +384,7 @@ in buildPythonPackage {
  ] ++ lib.optionals (pythonOlder "3.4") [
    backports_weakref enum34
  ] ++ lib.optionals withTensorboard [
-    tensorflow-tensorboard
+    tensorflow-tensorboard_1
  ];

  nativeBuildInputs = lib.optional cudaSupport addOpenGLRunpath;
--- a/pkgs/development/python-modules/tensorflow/1/lift-gast-restriction.patch
+++ b/pkgs/development/python-modules/tensorflow/1/lift-gast-restriction.patch
--- a/pkgs/development/python-modules/tensorflow/1/prefetcher.sh
+++ b/pkgs/development/python-modules/tensorflow/1/prefetcher.sh
@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+version=1.14.0
+hashfile=binary-hashes.nix
+rm -f $hashfile
+echo "{" >> $hashfile
+echo "version = \"$version\";" >> $hashfile
+for sys in "linux" "mac"; do
+    for tfpref in "cpu/tensorflow" "gpu/tensorflow_gpu"; do
+        for pykind in "py2-none-any" "py3-none-any" "cp27-none-linux_x86_64" "cp35-cp35m-linux_x86_64" "cp36-cp36m-linux_x86_64" "cp37-cp37m-linux_x86_64"; do
+            if [ $sys == "mac" ]; then
+               [[ $pykind =~ py.* ]] && [[ $tfpref =~ cpu.* ]]
+               result=$?
+               pyver=${pykind:2:1}
+               flavour=cpu
+            else
+               [[ $pykind =~ .*linux.* ]]
+               result=$?
+               pyver=${pykind:2:2}
+               flavour=${tfpref:0:3}
+            fi
+            if [ $result == 0 ]; then
+                url=https://storage.googleapis.com/tensorflow/$sys/$tfpref-$version-$pykind.whl
+                hash=$(nix-prefetch-url $url)
+                echo "${sys}_py_${pyver}_${flavour} = {" >> $hashfile
+                echo "  url = \"$url\";" >> $hashfile
+                echo "  sha256 = \"$hash\";" >> $hashfile
+                echo "};" >> $hashfile
+            fi
+        done
+    done
+done
+echo "}" >> $hashfile
--- a/pkgs/development/python-modules/tensorflow/2/bin.nix
+++ b/pkgs/development/python-modules/tensorflow/2/bin.nix
@ -18,7 +18,7 @@
 , wheel
 , opt-einsum
 , backports_weakref
-, tensorflow-estimator
+, tensorflow-estimator_2
 , tensorflow-tensorboard
 , cudaSupport ? false
 , cudatoolkit ? null
@ -76,7 +76,7 @@ in buildPythonPackage {
    opt-einsum
    google-pasta
    wrapt
-    tensorflow-estimator
+    tensorflow-estimator_2
    tensorflow-tensorboard
    keras-applications
    keras-preprocessing
--- a/pkgs/development/python-modules/tensorflow/2/binary-hashes.nix
+++ b/pkgs/development/python-modules/tensorflow/2/binary-hashes.nix
--- a/pkgs/development/python-modules/tensorflow/2/default.nix
+++ b/pkgs/development/python-modules/tensorflow/2/default.nix
@ -0,0 +1,421 @@
+{ stdenv, pkgs, bazel_0_29, buildBazelPackage, lib, fetchFromGitHub, fetchpatch, symlinkJoin
+, addOpenGLRunpath
+# Python deps
+, buildPythonPackage, isPy3k, isPy27, pythonOlder, pythonAtLeast, python
+# Python libraries
+, numpy, tensorflow-tensorboard_2, backports_weakref, mock, enum34, absl-py
+, future, setuptools, wheel, keras-preprocessing, keras-applications, google-pasta
+, functools32
+, opt-einsum
+, termcolor, grpcio, six, wrapt, protobuf, tensorflow-estimator_2
+# Common deps
+, git, swig, which, binutils, glibcLocales, cython
+# Common libraries
+, jemalloc, openmpi, astor, gast, grpc, sqlite, openssl, jsoncpp, re2
+, curl, snappy, flatbuffers, icu, double-conversion, libpng, libjpeg, giflib
+# Upsteam by default includes cuda support since tensorflow 1.15. We could do
+# that in nix as well. It would make some things easier and less confusing, but
+# it would also make the default tensorflow package unfree. See
+# https://groups.google.com/a/tensorflow.org/forum/#!topic/developers/iRCt5m4qUz0
+, cudaSupport ? false, nvidia_x11 ? null, cudatoolkit ? null, cudnn ? null, nccl ? null
+# XLA without CUDA is broken
+, xlaSupport ? cudaSupport
+# Default from ./configure script
+, cudaCapabilities ? [ "3.5" "5.2" ]
+, sse42Support ? builtins.elem (stdenv.hostPlatform.platform.gcc.arch or "default") ["westmere" "sandybridge" "ivybridge" "haswell" "broadwell" "skylake" "skylake-avx512"]
+, avx2Support  ? builtins.elem (stdenv.hostPlatform.platform.gcc.arch or "default") [                                     "haswell" "broadwell" "skylake" "skylake-avx512"]
+, fmaSupport   ? builtins.elem (stdenv.hostPlatform.platform.gcc.arch or "default") [                                     "haswell" "broadwell" "skylake" "skylake-avx512"]
+# Darwin deps
+, Foundation, Security
+}:
+
+assert cudaSupport -> nvidia_x11 != null
+                   && cudatoolkit != null
+                   && cudnn != null;
+
+# unsupported combination
+assert ! (stdenv.isDarwin && cudaSupport);
+
+let
+  withTensorboard = pythonOlder "3.6";
+
+  cudatoolkit_joined = symlinkJoin {
+    name = "${cudatoolkit.name}-merged";
+    paths = [
+      cudatoolkit.lib
+      cudatoolkit.out
+      # for some reason some of the required libs are in the targets/x86_64-linux
+      # directory; not sure why but this works around it
+      "${cudatoolkit}/targets/${stdenv.system}"
+    ];
+  };
+
+  cudatoolkit_cc_joined = symlinkJoin {
+    name = "${cudatoolkit.cc.name}-merged";
+    paths = [
+      cudatoolkit.cc
+      binutils.bintools # for ar, dwp, nm, objcopy, objdump, strip
+    ];
+  };
+
+  # Needed for _some_ system libraries, grep INCLUDEDIR.
+  includes_joined = symlinkJoin {
+    name = "tensorflow-deps-merged";
+    paths = [
+      pkgs.protobuf
+      jsoncpp
+    ];
+  };
+
+  tfFeature = x: if x then "1" else "0";
+
+  version = "2.1.0";
+  variant = if cudaSupport then "-gpu" else "";
+  pname = "tensorflow${variant}";
+
+  pythonEnv = python.withPackages (_:
+    [ # python deps needed during wheel build time (not runtime, see the buildPythonPackage part for that)
+      numpy
+      keras-preprocessing
+      protobuf
+      wrapt
+      gast
+      astor
+      absl-py
+      termcolor
+      keras-applications
+      setuptools
+      wheel
+  ] ++ lib.optionals (!isPy3k)
+  [ future
+    functools32
+    mock
+  ]);
+
+  bazel-build = buildBazelPackage {
+    name = "${pname}-${version}";
+    bazel = bazel_0_29;
+
+    src = fetchFromGitHub {
+      owner = "tensorflow";
+      repo = "tensorflow";
+      rev = "v${version}";
+      sha256 = "1g79xi8yl4sjia8ysk9b7xfzrz83zy28v5dlb2wzmcf0k5pmz60p";
+    };
+
+    patches = [
+      # Work around https://github.com/tensorflow/tensorflow/issues/24752
+      ../no-saved-proto.patch
+      # Fixes for NixOS jsoncpp
+      ../system-jsoncpp.patch
+
+      (fetchpatch {
+        name = "backport-pr-18950.patch";
+        url = "https://github.com/tensorflow/tensorflow/commit/73640aaec2ab0234d9fff138e3c9833695570c0a.patch";
+        sha256 = "1n9ypbrx36fc1kc9cz5b3p9qhg15xxhq4nz6ap3hwqba535nakfz";
+      })
+
+      (fetchpatch {
+        # Don't try to fetch things that don't exist
+        name = "prune-missing-deps.patch";
+        url = "https://github.com/tensorflow/tensorflow/commit/b39b1ed24b4814db27d2f748dc85c10730ae851d.patch";
+        sha256 = "1skysz53nancvw1slij6s7flar2kv3gngnsq60ff4lap88kx5s6c";
+        excludes = [ "tensorflow/cc/saved_model/BUILD" ];
+      })
+
+      ./lift-gast-restriction.patch
+
+      # cuda 10.2 does not have "-bin2c-path" option anymore
+      # https://github.com/tensorflow/tensorflow/issues/34429
+      ../cuda-10.2-no-bin2c-path.patch
+    ];
+
+    # On update, it can be useful to steal the changes from gentoo
+    # https://gitweb.gentoo.org/repo/gentoo.git/tree/sci-libs/tensorflow
+
+    nativeBuildInputs = [
+      swig which pythonEnv
+    ] ++ lib.optional cudaSupport addOpenGLRunpath;
+
+    buildInputs = [
+      jemalloc
+      openmpi
+      glibcLocales
+      git
+
+      # libs taken from system through the TF_SYS_LIBS mechanism
+      # grpc
+      sqlite
+      openssl
+      jsoncpp
+      pkgs.protobuf
+      curl
+      snappy
+      flatbuffers
+      icu
+      double-conversion
+      libpng
+      libjpeg
+      giflib
+      re2
+      pkgs.lmdb
+    ] ++ lib.optionals cudaSupport [
+      cudatoolkit
+      cudnn
+      nvidia_x11
+    ] ++ lib.optionals stdenv.isDarwin [
+      Foundation
+      Security
+    ];
+
+    # arbitrarily set to the current latest bazel version, overly careful
+    TF_IGNORE_MAX_BAZEL_VERSION = true;
+
+    # Take as many libraries from the system as possible. Keep in sync with
+    # list of valid syslibs in
+    # https://github.com/tensorflow/tensorflow/blob/master/third_party/systemlibs/syslibs_configure.bzl
+    TF_SYSTEM_LIBS = lib.concatStringsSep "," [
+      "absl_py"
+      "astor_archive"
+      "boringssl"
+      # Not packaged in nixpkgs
+      # "com_github_googleapis_googleapis"
+      # "com_github_googlecloudplatform_google_cloud_cpp"
+      "com_google_protobuf"
+      "com_googlesource_code_re2"
+      "curl"
+      "cython"
+      "double_conversion"
+      "flatbuffers"
+      "gast_archive"
+      # Lots of errors, requires an older version
+      # "grpc"
+      "hwloc"
+      "icu"
+      "jpeg"
+      "jsoncpp_git"
+      "keras_applications_archive"
+      "lmdb"
+      "nasm"
+      # "nsync" # not packaged in nixpkgs
+      "opt_einsum_archive"
+      "org_sqlite"
+      "pasta"
+      "pcre"
+      "six_archive"
+      "snappy"
+      "swig"
+      "termcolor_archive"
+      "wrapt"
+      "zlib_archive"
+    ];
+
+    INCLUDEDIR = "${includes_joined}/include";
+
+    PYTHON_BIN_PATH = pythonEnv.interpreter;
+
+    TF_NEED_GCP = true;
+    TF_NEED_HDFS = true;
+    TF_ENABLE_XLA = tfFeature xlaSupport;
+
+    CC_OPT_FLAGS = " ";
+
+    # https://github.com/tensorflow/tensorflow/issues/14454
+    TF_NEED_MPI = tfFeature cudaSupport;
+
+    TF_NEED_CUDA = tfFeature cudaSupport;
+    TF_CUDA_PATHS = lib.optionalString cudaSupport "${cudatoolkit_joined},${cudnn},${nccl}";
+    GCC_HOST_COMPILER_PREFIX = lib.optionalString cudaSupport "${cudatoolkit_cc_joined}/bin";
+    GCC_HOST_COMPILER_PATH = lib.optionalString cudaSupport "${cudatoolkit_cc_joined}/bin/gcc";
+    TF_CUDA_COMPUTE_CAPABILITIES = lib.concatStringsSep "," cudaCapabilities;
+
+    postPatch = ''
+      # https://github.com/tensorflow/tensorflow/issues/20919
+      sed -i '/androidndk/d' tensorflow/lite/kernels/internal/BUILD
+
+      # Tensorboard pulls in a bunch of dependencies, some of which may
+      # include security vulnerabilities. So we make it optional.
+      # https://github.com/tensorflow/tensorflow/issues/20280#issuecomment-400230560
+      sed -i '/tensorboard >=/d' tensorflow/tools/pip_package/setup.py
+    '';
+
+    preConfigure = let
+      opt_flags = []
+        ++ lib.optionals sse42Support ["-msse4.2"]
+        ++ lib.optionals avx2Support ["-mavx2"]
+        ++ lib.optionals fmaSupport ["-mfma"];
+    in ''
+      patchShebangs configure
+
+      # dummy ldconfig
+      mkdir dummy-ldconfig
+      echo "#!${stdenv.shell}" > dummy-ldconfig/ldconfig
+      chmod +x dummy-ldconfig/ldconfig
+      export PATH="$PWD/dummy-ldconfig:$PATH"
+
+      export PYTHON_LIB_PATH="$NIX_BUILD_TOP/site-packages"
+      export CC_OPT_FLAGS="${lib.concatStringsSep " " opt_flags}"
+      mkdir -p "$PYTHON_LIB_PATH"
+
+      # To avoid mixing Python 2 and Python 3
+      unset PYTHONPATH
+    '';
+
+    configurePhase = ''
+      runHook preConfigure
+      ./configure
+      runHook postConfigure
+    '';
+
+    # FIXME: Tensorflow uses dlopen() for CUDA libraries.
+    NIX_LDFLAGS = lib.optionalString cudaSupport "-lcudart -lcublas -lcufft -lcurand -lcusolver -lcusparse -lcudnn";
+
+    hardeningDisable = [ "format" ];
+
+    bazelFlags = [
+      # temporary fixes to make the build work with bazel 0.27
+      "--incompatible_no_support_tools_in_action_inputs=false"
+    ];
+    bazelBuildFlags = [
+      "--config=opt" # optimize using the flags set in the configure phase
+    ];
+
+    bazelTarget = "//tensorflow/tools/pip_package:build_pip_package //tensorflow/tools/lib_package:libtensorflow";
+
+    fetchAttrs = {
+      # So that checksums don't depend on these.
+      TF_SYSTEM_LIBS = null;
+
+      # cudaSupport causes fetch of ncclArchive, resulting in different hashes
+      sha256 = if cudaSupport then
+        "0hg3ysy644950a34j28hrb317cz8gcbb9n84d36wdailvnlshghb"
+      else
+        "1gy4pz9kn30wb9c4a9584fibb88c3h38y3dqa99yw1lbsbyyi28c";
+    };
+
+    buildAttrs = {
+      outputs = [ "out" "python" ];
+
+      preBuild = ''
+        patchShebangs .
+      '';
+
+      installPhase = ''
+        mkdir -p "$out"
+        tar -xf bazel-bin/tensorflow/tools/lib_package/libtensorflow.tar.gz -C "$out"
+        # Write pkgconfig file.
+        mkdir "$out/lib/pkgconfig"
+        cat > "$out/lib/pkgconfig/tensorflow.pc" << EOF
+        Name: TensorFlow
+        Version: ${version}
+        Description: Library for computation using data flow graphs for scalable machine learning
+        Requires:
+        Libs: -L$out/lib -ltensorflow
+        Cflags: -I$out/include/tensorflow
+        EOF
+
+        # build the source code, then copy it to $python (build_pip_package
+        # actually builds a symlink farm so we must dereference them).
+        bazel-bin/tensorflow/tools/pip_package/build_pip_package --src "$PWD/dist"
+        cp -Lr "$PWD/dist" "$python"
+      '';
+
+      postFixup = lib.optionalString cudaSupport ''
+        find $out -type f \( -name '*.so' -or -name '*.so.*' \) | while read lib; do
+          addOpenGLRunpath "$lib"
+        done
+      '';
+    };
+
+    meta = with stdenv.lib; {
+      description = "Computation using data flow graphs for scalable machine learning";
+      homepage = http://tensorflow.org;
+      license = licenses.asl20;
+      maintainers = with maintainers; [ jyp abbradar ];
+      platforms = with platforms; linux ++ darwin;
+      # The py2 build fails due to some issue importing protobuf. Possibly related to the fix in
+      # https://github.com/akesandgren/easybuild-easyblocks/commit/1f2e517ddfd1b00a342c6abb55aef3fd93671a2b
+      broken = !(xlaSupport -> cudaSupport) || !isPy3k;
+    };
+  };
+
+in buildPythonPackage {
+  inherit version pname;
+  disabled = isPy27 || (pythonAtLeast "3.8");
+
+  src = bazel-build.python;
+
+  # Upstream has a pip hack that results in bin/tensorboard being in both tensorflow
+  # and the propagated input tensorflow-tensorboard, which causes environment collisions.
+  # Another possibility would be to have tensorboard only in the buildInputs
+  # https://github.com/tensorflow/tensorflow/blob/v1.7.1/tensorflow/tools/pip_package/setup.py#L79
+  postInstall = ''
+    rm $out/bin/tensorboard
+  '';
+
+  setupPyGlobalFlags = [ "--project_name ${pname}" ];
+
+  # tensorflow/tools/pip_package/setup.py
+  propagatedBuildInputs = [
+    absl-py
+    astor
+    gast
+    google-pasta
+    keras-applications
+    keras-preprocessing
+    numpy
+    six
+    protobuf
+    tensorflow-estimator_2
+    termcolor
+    wrapt
+    grpcio
+    opt-einsum
+  ] ++ lib.optionals (!isPy3k) [
+    mock
+    future
+    functools32
+  ] ++ lib.optionals (pythonOlder "3.4") [
+    backports_weakref enum34
+  ] ++ lib.optionals withTensorboard [
+    tensorflow-tensorboard_2
+  ];
+
+  nativeBuildInputs = lib.optional cudaSupport addOpenGLRunpath;
+
+  postFixup = lib.optionalString cudaSupport ''
+    find $out -type f \( -name '*.so' -or -name '*.so.*' \) | while read lib; do
+      addOpenGLRunpath "$lib"
+    done
+  '';
+
+  # Actual tests are slow and impure.
+  # TODO try to run them anyway
+  # TODO better test (files in tensorflow/tools/ci_build/builds/*test)
+  checkPhase = ''
+    ${python.interpreter} <<EOF
+    # A simple "Hello world"
+    import tensorflow as tf
+    hello = tf.constant("Hello, world!")
+    tf.print(hello)
+
+    # Fit a simple model to random data
+    import numpy as np
+    np.random.seed(0)
+    tf.random.set_seed(0)
+    model = tf.keras.models.Sequential([
+        tf.keras.layers.Dense(1, activation="linear")
+    ])
+    model.compile(optimizer="sgd", loss="mse")
+
+    x = np.random.uniform(size=(1,1))
+    y = np.random.uniform(size=(1,))
+    model.fit(x, y, epochs=1)
+    EOF
+  '';
+  # Regression test for #77626 removed because not more `tensorflow.contrib`.
+
+  passthru.libtensorflow = bazel-build.out;
+
+  inherit (bazel-build) meta;
+}
--- a/pkgs/development/python-modules/tensorflow/2/lift-gast-restriction.patch
+++ b/pkgs/development/python-modules/tensorflow/2/lift-gast-restriction.patch
@ -0,0 +1,11 @@
+diff --git a/tensorflow/tools/pip_package/setup.py b/tensorflow/tools/pip_package/setup.py
+index 992f2eae22..d9386f9b13 100644
+--- a/tensorflow/tools/pip_package/setup.py
+++ b/tensorflow/tools/pip_package/setup.py
+@@ -54,5 +54,5 @@ REQUIRED_PACKAGES = [
+     'enum34 >= 1.1.6;python_version<"3.4"',
+-    'gast == 0.2.2',
+    'gast >= 0.2.2',
+     'google_pasta >= 0.1.6',
+     'keras_applications >= 1.0.8',
+     'keras_preprocessing >= 1.0.5',
--- a/pkgs/development/python-modules/tensorflow/2/prefetcher.sh
+++ b/pkgs/development/python-modules/tensorflow/2/prefetcher.sh
--- a/pkgs/development/tools/build-managers/bazel/bazel_0_26/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_0_26/default.nix
--- a/pkgs/development/tools/build-managers/bazel/bazel_0_26/glibc.patch
+++ b/pkgs/development/tools/build-managers/bazel/bazel_0_26/glibc.patch
--- a/pkgs/development/tools/build-managers/bazel/bazel_0_26/python-stub-path-fix.patch
+++ b/pkgs/development/tools/build-managers/bazel/bazel_0_26/python-stub-path-fix.patch
--- a/pkgs/development/tools/build-managers/bazel/bazel_0_29/default.nix
+++ b/pkgs/development/tools/build-managers/bazel/bazel_0_29/default.nix
@ -0,0 +1,559 @@
+{ stdenv, callPackage, lib, fetchurl, fetchFromGitHub
+, runCommand, runCommandCC, makeWrapper, recurseIntoAttrs
+# this package (through the fixpoint glass)
+, bazel_1
+, lr, xe, zip, unzip, bash, writeCBin, coreutils
+, which, gawk, gnused, gnutar, gnugrep, gzip, findutils
+# updater
+, python27, python3, writeScript
+# Apple dependencies
+, cctools, libcxx, CoreFoundation, CoreServices, Foundation
+# Allow to independently override the jdks used to build and run respectively
+, buildJdk, runJdk
+, buildJdkName
+, runtimeShell
+# Downstream packages for tests
+, bazel-watcher
+# Always assume all markers valid (this is needed because we remove markers; they are non-deterministic).
+# Also, don't clean up environment variables (so that NIX_ environment variables are passed to compilers).
+, enableNixHacks ? false
+, gcc-unwrapped
+, autoPatchelfHook
+, file
+, substituteAll
+, writeTextFile
+}:
+
+let
+  version = "0.29.1";
+
+  src = fetchurl {
+    url = "https://github.com/bazelbuild/bazel/releases/download/${version}/bazel-${version}-dist.zip";
+    sha256 = "1rcd6xy61n07n7m6dgcw23275r8z3gkwmqdkd48nwrq8yb7m4al7";
+  };
+
+  # Update with `eval $(nix-build -A bazel.updater)`,
+  # then add new dependencies from the dict in ./src-deps.json as required.
+  srcDeps = lib.attrsets.attrValues srcDepsSet;
+  srcDepsSet =
+    let
+      srcs = (builtins.fromJSON (builtins.readFile ./src-deps.json));
+      toFetchurl = d: lib.attrsets.nameValuePair d.name (fetchurl {
+        urls = d.urls;
+        sha256 = d.sha256;
+        });
+        in builtins.listToAttrs (map toFetchurl [
+      srcs.desugar_jdk_libs
+      srcs.io_bazel_skydoc
+      srcs.bazel_skylib
+      srcs.io_bazel_rules_sass
+      srcs.platforms
+      (if stdenv.hostPlatform.isDarwin
+       then srcs."java_tools_javac11_darwin-v4.0.zip"
+       else srcs."java_tools_javac11_linux-v4.0.zip")
+      srcs."coverage_output_generator-v1.0.zip"
+      srcs.build_bazel_rules_nodejs
+      srcs."android_tools_pkg-0.8.tar.gz"
+      srcs."0.27.1.tar.gz"
+      srcs.rules_pkg
+      srcs.rules_cc
+      srcs.rules_java
+      srcs.rules_proto
+      ]);
+
+  distDir = runCommand "bazel-deps" {} ''
+    mkdir -p $out
+    for i in ${builtins.toString srcDeps}; do cp $i $out/$(stripHash $i); done
+  '';
+
+  defaultShellPath = lib.makeBinPath
+    # Keep this list conservative. For more exotic tools, prefer to use
+    # @rules_nixpkgs to pull in tools from the nix repository. Example:
+    #
+    # WORKSPACE:
+    #
+    #     nixpkgs_git_repository(
+    #         name = "nixpkgs",
+    #         revision = "def5124ec8367efdba95a99523dd06d918cb0ae8",
+    #     )
+    #
+    #     # This defines an external Bazel workspace.
+    #     nixpkgs_package(
+    #         name = "bison",
+    #         repositories = { "nixpkgs": "@nixpkgs//:default.nix" },
+    #     )
+    #
+    # some/BUILD.bazel:
+    #
+    #     genrule(
+    #        ...
+    #        cmd = "$(location @bison//:bin/bison) -other -args",
+    #        tools = [
+    #            ...
+    #            "@bison//:bin/bison",
+    #        ],
+    #     )
+    #
+    [ bash coreutils findutils gawk gnugrep gnutar gnused gzip which unzip file zip ];
+
+  # Java toolchain used for the build and tests
+  javaToolchain = "@bazel_tools//tools/jdk:toolchain_host${buildJdkName}";
+
+  platforms = lib.platforms.linux ++ lib.platforms.darwin;
+
+  # This repository is fetched by bazel at runtime
+  # however it contains prebuilt java binaries, with wrong interpreter
+  # and libraries path.
+  # We prefetch it, patch it, and override it in a global bazelrc.
+  system = if stdenv.hostPlatform.isDarwin then "darwin" else "linux";
+
+  remote_java_tools = stdenv.mkDerivation {
+    name = "remote_java_tools_${system}";
+
+    src = srcDepsSet."java_tools_javac11_${system}-v4.0.zip";
+
+    nativeBuildInputs = [ autoPatchelfHook unzip ];
+    buildInputs = [ gcc-unwrapped ];
+
+    sourceRoot = ".";
+
+    buildPhase = ''
+      mkdir $out;
+    '';
+
+    installPhase = ''
+      cp -Ra * $out/
+      touch $out/WORKSPACE
+    '';
+  };
+
+  bazelRC = writeTextFile {
+    name = "bazel-rc";
+    text = ''
+      build --override_repository=${remote_java_tools.name}=${remote_java_tools}
+      build --distdir=${distDir}
+      startup --server_javabase=${runJdk}
+
+      # load default location for the system wide configuration
+      try-import /etc/bazel.bazelrc
+    '';
+  };
+
+in
+stdenv.mkDerivation rec {
+  pname = "bazel";
+  inherit version;
+
+  meta = with lib; {
+    homepage = "https://github.com/bazelbuild/bazel/";
+    description = "Build tool that builds code quickly and reliably";
+    license = licenses.asl20;
+    maintainers = [ maintainers.mboes ];
+    inherit platforms;
+  };
+
+  inherit src;
+  sourceRoot = ".";
+
+  patches = [
+    # On Darwin, the last argument to gcc is coming up as an empty string. i.e: ''
+    # This is breaking the build of any C target. This patch removes the last
+    # argument if it's found to be an empty string.
+    ../trim-last-argument-to-gcc-if-empty.patch
+    ./glibc.patch
+
+    # --experimental_strict_action_env (which may one day become the default
+    # see bazelbuild/bazel#2574) hardcodes the default
+    # action environment to a non hermetic value (e.g. "/usr/local/bin").
+    # This is non hermetic on non-nixos systems. On NixOS, bazel cannot find the required binaries.
+    # So we are replacing this bazel paths by defaultShellPath,
+    # improving hermeticity and making it work in nixos.
+    (substituteAll {
+      src = ../strict_action_env.patch;
+      strictActionEnvPatch = defaultShellPath;
+    })
+
+    # bazel reads its system bazelrc in /etc
+    # override this path to a builtin one
+    (substituteAll {
+      src = ../bazel_rc.patch;
+      bazelSystemBazelRCPath = bazelRC;
+    })
+  ] ++ lib.optional enableNixHacks ../nix-hacks.patch;
+
+
+  # Additional tests that check bazel’s functionality. Execute
+  #
+  #     nix-build . -A bazel.tests
+  #
+  # in the nixpkgs checkout root to exercise them locally.
+  passthru.tests =
+    let
+      runLocal = name: attrs: script:
+      let
+        attrs' = removeAttrs attrs [ "buildInputs" ];
+        buildInputs = [ python3 ] ++ (attrs.buildInputs or []);
+      in
+      runCommandCC name ({
+        inherit buildInputs;
+        preferLocalBuild = true;
+        meta.platforms = platforms;
+      } // attrs') script;
+
+      # bazel wants to extract itself into $install_dir/install every time it runs,
+      # so let’s do that only once.
+      extracted = bazelPkg:
+        let install_dir =
+          # `install_base` field printed by `bazel info`, minus the hash.
+          # yes, this path is kinda magic. Sorry.
+          "$HOME/.cache/bazel/_bazel_nixbld";
+        in runLocal "bazel-extracted-homedir" { passthru.install_dir = install_dir; } ''
+            export HOME=$(mktemp -d)
+            touch WORKSPACE # yeah, everything sucks
+            install_base="$(${bazelPkg}/bin/bazel info | grep install_base)"
+            # assert it’s actually below install_dir
+            [[ "$install_base" =~ ${install_dir} ]] \
+              || (echo "oh no! $install_base but we are \
+            trying to copy ${install_dir} to $out instead!"; exit 1)
+            cp -R ${install_dir} $out
+          '';
+
+      bazelTest = { name, bazelScript, workspaceDir, bazelPkg, buildInputs ? [] }:
+        let
+          be = extracted bazelPkg;
+        in runLocal name { inherit buildInputs; } (
+          # skip extraction caching on Darwin, because nobody knows how Darwin works
+          (lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
+            # set up home with pre-unpacked bazel
+            export HOME=$(mktemp -d)
+            mkdir -p ${be.install_dir}
+            cp -R ${be}/install ${be.install_dir}
+
+            # https://stackoverflow.com/questions/47775668/bazel-how-to-skip-corrupt-installation-on-centos6
+            # Bazel checks whether the mtime of the install dir files
+            # is >9 years in the future, otherwise it extracts itself again.
+            # see PosixFileMTime::IsUntampered in src/main/cpp/util
+            # What the hell bazel.
+            ${lr}/bin/lr -0 -U ${be.install_dir} | ${xe}/bin/xe -N0 -0 touch --date="9 years 6 months" {}
+          '')
+          +
+          ''
+            # Note https://github.com/bazelbuild/bazel/issues/5763#issuecomment-456374609
+            # about why to create a subdir for the workspace.
+            cp -r ${workspaceDir} wd && chmod u+w wd && cd wd
+
+            ${bazelScript}
+
+            touch $out
+          '');
+
+      bazelWithNixHacks = bazel_1.override { enableNixHacks = true; };
+
+      bazel-examples = fetchFromGitHub {
+        owner = "bazelbuild";
+        repo = "examples";
+        rev = "5d8c8961a2516ebf875787df35e98cadd08d43dc";
+        sha256 = "03c1bwlq5bs3hg96v4g4pg2vqwhqq6w538h66rcpw02f83yy7fs8";
+      };
+
+    in (if !stdenv.hostPlatform.isDarwin then {
+      # `extracted` doesn’t work on darwin
+      shebang = callPackage ./shebang-test.nix { inherit runLocal extracted bazelTest distDir; };
+    } else {}) // {
+      bashTools = callPackage ./bash-tools-test.nix { inherit runLocal bazelTest distDir; };
+      cpp = callPackage ./cpp-test.nix { inherit runLocal bazelTest bazel-examples distDir; };
+      java = callPackage ./java-test.nix { inherit runLocal bazelTest bazel-examples distDir; };
+      protobuf = callPackage ./protobuf-test.nix { inherit runLocal bazelTest distDir; };
+      pythonBinPath = callPackage ./python-bin-path-test.nix { inherit runLocal bazelTest distDir; };
+
+      bashToolsWithNixHacks = callPackage ./bash-tools-test.nix { inherit runLocal bazelTest distDir; bazel = bazelWithNixHacks; };
+
+      cppWithNixHacks = callPackage ./cpp-test.nix { inherit runLocal bazelTest bazel-examples distDir; bazel = bazelWithNixHacks; };
+      javaWithNixHacks = callPackage ./java-test.nix { inherit runLocal bazelTest bazel-examples distDir; bazel = bazelWithNixHacks; };
+      protobufWithNixHacks = callPackage ./protobuf-test.nix { inherit runLocal bazelTest distDir; bazel = bazelWithNixHacks; };
+      pythonBinPathWithNixHacks = callPackage ./python-bin-path-test.nix { inherit runLocal bazelTest distDir; bazel = bazelWithNixHacks; };
+
+      # downstream packages using buildBazelPackage
+      # fixed-output hashes of the fetch phase need to be spot-checked manually
+      downstream = recurseIntoAttrs ({
+        inherit bazel-watcher;
+      }
+          # dm-sonnet is only packaged for linux
+      // (lib.optionalAttrs stdenv.isLinux {
+          # TODO(timokau) dm-sonnet is broken currently
+          # dm-sonnet-linux = python3.pkgs.dm-sonnet;
+      }));
+    };
+
+  # update the list of workspace dependencies
+  passthru.updater = writeScript "update-bazel-deps.sh" ''
+    #!${runtimeShell}
+    cat ${runCommand "bazel-deps.json" {} ''
+        ${unzip}/bin/unzip ${src} WORKSPACE
+        ${python3}/bin/python3 ${../update-srcDeps.py} ./WORKSPACE > $out
+    ''} > ${builtins.toString ./src-deps.json}
+  '';
+
+  # Necessary for the tests to pass on Darwin with sandbox enabled.
+  # Bazel starts a local server and needs to bind a local address.
+  __darwinAllowLocalNetworking = true;
+
+  # Bazel expects several utils to be available in Bash even without PATH. Hence this hack.
+  customBash = writeCBin "bash" ''
+    #include <stdio.h>
+    #include <stdlib.h>
+    #include <string.h>
+    #include <unistd.h>
+
+    extern char **environ;
+
+    int main(int argc, char *argv[]) {
+      char *path = getenv("PATH");
+      char *pathToAppend = "${defaultShellPath}";
+      char *newPath;
+      if (path != NULL) {
+        int length = strlen(path) + 1 + strlen(pathToAppend) + 1;
+        newPath = malloc(length * sizeof(char));
+        snprintf(newPath, length, "%s:%s", path, pathToAppend);
+      } else {
+        newPath = pathToAppend;
+      }
+      setenv("PATH", newPath, 1);
+      execve("${bash}/bin/bash", argv, environ);
+      return 0;
+    }
+  '';
+
+  postPatch = let
+
+    darwinPatches = ''
+      bazelLinkFlags () {
+        eval set -- "$NIX_LDFLAGS"
+        local flag
+        for flag in "$@"; do
+          printf ' -Wl,%s' "$flag"
+        done
+      }
+
+      # Disable Bazel's Xcode toolchain detection which would configure compilers
+      # and linkers from Xcode instead of from PATH
+      export BAZEL_USE_CPP_ONLY_TOOLCHAIN=1
+
+      # Explicitly configure gcov since we don't have it on Darwin, so autodetection fails
+      export GCOV=${coreutils}/bin/false
+
+      # Framework search paths aren't added by bintools hook
+      # https://github.com/NixOS/nixpkgs/pull/41914
+      export NIX_LDFLAGS+=" -F${CoreFoundation}/Library/Frameworks -F${CoreServices}/Library/Frameworks -F${Foundation}/Library/Frameworks"
+
+      # libcxx includes aren't added by libcxx hook
+      # https://github.com/NixOS/nixpkgs/pull/41589
+      export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -isystem ${libcxx}/include/c++/v1"
+
+      # don't use system installed Xcode to run clang, use Nix clang instead
+      sed -i -E "s;/usr/bin/xcrun (--sdk macosx )?clang;${stdenv.cc}/bin/clang $NIX_CFLAGS_COMPILE $(bazelLinkFlags) -framework CoreFoundation;g" \
+        scripts/bootstrap/compile.sh \
+        src/tools/xcode/realpath/BUILD \
+        src/tools/xcode/stdredirect/BUILD \
+        tools/osx/BUILD
+
+      # nixpkgs's libSystem cannot use pthread headers directly, must import GCD headers instead
+      sed -i -e "/#include <pthread\/spawn.h>/i #include <dispatch/dispatch.h>" src/main/cpp/blaze_util_darwin.cc
+
+      # clang installed from Xcode has a compatibility wrapper that forwards
+      # invocations of gcc to clang, but vanilla clang doesn't
+      sed -i -e 's;_find_generic(repository_ctx, "gcc", "CC", overriden_tools);_find_generic(repository_ctx, "clang", "CC", overriden_tools);g' tools/cpp/unix_cc_configure.bzl
+
+      sed -i -e 's;/usr/bin/libtool;${cctools}/bin/libtool;g' tools/cpp/unix_cc_configure.bzl
+      wrappers=( tools/cpp/osx_cc_wrapper.sh tools/cpp/osx_cc_wrapper.sh.tpl )
+      for wrapper in "''${wrappers[@]}"; do
+        sed -i -e "s,/usr/bin/install_name_tool,${cctools}/bin/install_name_tool,g" $wrapper
+      done
+    '';
+
+    genericPatches = ''
+      # Substitute j2objc and objc wrapper's python shebang to plain python path.
+      # These scripts explicitly depend on Python 2.7, hence we use python27.
+      # See also `postFixup` where python27 is added to $out/nix-support
+      substituteInPlace tools/j2objc/j2objc_header_map.py --replace "$!/usr/bin/python2.7" "#!${python27}/bin/python"
+      substituteInPlace tools/j2objc/j2objc_wrapper.py --replace "$!/usr/bin/python2.7" "#!${python27}/bin/python"
+      substituteInPlace tools/objc/j2objc_dead_code_pruner.py --replace "$!/usr/bin/python2.7" "#!${python27}/bin/python"
+
+      # md5sum is part of coreutils
+      sed -i 's|/sbin/md5|md5sum|' \
+        src/BUILD
+
+      # substituteInPlace is rather slow, so prefilter the files with grep
+      grep -rlZ /bin src/main/java/com/google/devtools | while IFS="" read -r -d "" path; do
+        # If you add more replacements here, you must change the grep above!
+        # Only files containing /bin are taken into account.
+        # We default to python3 where possible. See also `postFixup` where
+        # python3 is added to $out/nix-support
+        substituteInPlace "$path" \
+          --replace /bin/bash ${customBash}/bin/bash \
+          --replace "/usr/bin/env bash" ${customBash}/bin/bash \
+          --replace "/usr/bin/env python" ${python3}/bin/python \
+          --replace /usr/bin/env ${coreutils}/bin/env \
+          --replace /bin/true ${coreutils}/bin/true
+      done
+
+      # bazel test runner include references to /bin/bash
+      substituteInPlace tools/build_rules/test_rules.bzl \
+        --replace /bin/bash ${customBash}/bin/bash
+
+      for i in $(find tools/cpp/ -type f)
+      do
+        substituteInPlace $i \
+          --replace /bin/bash ${customBash}/bin/bash
+      done
+
+      # Fixup scripts that generate scripts. Not fixed up by patchShebangs below.
+      substituteInPlace scripts/bootstrap/compile.sh \
+          --replace /bin/bash ${customBash}/bin/bash
+
+      # add nix environment vars to .bazelrc
+      cat >> .bazelrc <<EOF
+      build --distdir=${distDir}
+      fetch --distdir=${distDir}
+      build --copt="$(echo $NIX_CFLAGS_COMPILE | sed -e 's/ /" --copt="/g')"
+      build --host_copt="$(echo $NIX_CFLAGS_COMPILE | sed -e 's/ /" --host_copt="/g')"
+      build --linkopt="-Wl,$(echo $NIX_LDFLAGS | sed -e 's/ /" --linkopt="-Wl,/g')"
+      build --host_linkopt="-Wl,$(echo $NIX_LDFLAGS | sed -e 's/ /" --host_linkopt="-Wl,/g')"
+      build --host_javabase='@local_jdk//:jdk'
+      build --host_java_toolchain='${javaToolchain}'
+      EOF
+
+      # add the same environment vars to compile.sh
+      sed -e "/\$command \\\\$/a --copt=\"$(echo $NIX_CFLAGS_COMPILE | sed -e 's/ /" --copt=\"/g')\" \\\\" \
+          -e "/\$command \\\\$/a --host_copt=\"$(echo $NIX_CFLAGS_COMPILE | sed -e 's/ /" --host_copt=\"/g')\" \\\\" \
+          -e "/\$command \\\\$/a --linkopt=\"-Wl,$(echo $NIX_LDFLAGS | sed -e 's/ /" --linkopt=\"-Wl,/g')\" \\\\" \
+          -e "/\$command \\\\$/a --host_linkopt=\"-Wl,$(echo $NIX_LDFLAGS | sed -e 's/ /" --host_linkopt=\"-Wl,/g')\" \\\\" \
+          -e "/\$command \\\\$/a --host_javabase='@local_jdk//:jdk' \\\\" \
+          -e "/\$command \\\\$/a --host_java_toolchain='${javaToolchain}' \\\\" \
+          -i scripts/bootstrap/compile.sh
+
+      # This is necessary to avoid:
+      # "error: no visible @interface for 'NSDictionary' declares the selector
+      # 'initWithContentsOfURL:error:'"
+      # This can be removed when the apple_sdk is upgraded beyond 10.13+
+      sed -i '/initWithContentsOfURL:versionPlistUrl/ {
+        N
+        s/error:nil\];/\];/
+      }' tools/osx/xcode_locator.m
+
+      # append the PATH with defaultShellPath in tools/bash/runfiles/runfiles.bash
+      echo "PATH=\$PATH:${defaultShellPath}" >> runfiles.bash.tmp
+      cat tools/bash/runfiles/runfiles.bash >> runfiles.bash.tmp
+      mv runfiles.bash.tmp tools/bash/runfiles/runfiles.bash
+
+      patchShebangs .
+    '';
+    in lib.optionalString stdenv.hostPlatform.isDarwin darwinPatches
+     + genericPatches;
+
+  buildInputs = [
+    buildJdk
+    python3
+  ];
+
+  # when a command can’t be found in a bazel build, you might also
+  # need to add it to `defaultShellPath`.
+  nativeBuildInputs = [
+    zip
+    python3
+    unzip
+    makeWrapper
+    which
+    customBash
+  ] ++ lib.optionals (stdenv.isDarwin) [ cctools libcxx CoreFoundation CoreServices Foundation ];
+
+  # Bazel makes extensive use of symlinks in the WORKSPACE.
+  # This causes problems with infinite symlinks if the build output is in the same location as the
+  # Bazel WORKSPACE. This is why before executing the build, the source code is moved into a
+  # subdirectory.
+  # Failing to do this causes "infinite symlink expansion detected"
+  preBuildPhases = ["preBuildPhase"];
+  preBuildPhase = ''
+    mkdir bazel_src
+    shopt -s dotglob extglob
+    mv !(bazel_src) bazel_src
+  '';
+
+  buildPhase = ''
+    # Increasing memory during compilation might be necessary.
+    # export BAZEL_JAVAC_OPTS="-J-Xmx2g -J-Xms200m"
+    ./bazel_src/compile.sh
+    ./bazel_src/scripts/generate_bash_completion.sh \
+        --bazel=./bazel_src/output/bazel \
+        --output=./bazel_src/output/bazel-complete.bash \
+        --prepend=./bazel_src/scripts/bazel-complete-header.bash \
+        --prepend=./bazel_src/scripts/bazel-complete-template.bash
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+
+    # official wrapper scripts that searches for $WORKSPACE_ROOT/tools/bazel
+    # if it can’t find something in tools, it calls $out/bin/bazel-real
+    cp ./bazel_src/scripts/packages/bazel.sh $out/bin/bazel
+    mv ./bazel_src/output/bazel $out/bin/bazel-real
+
+    # shell completion files
+    mkdir -p $out/share/bash-completion/completions $out/share/zsh/site-functions
+    mv ./bazel_src/output/bazel-complete.bash $out/share/bash-completion/completions/bazel
+    cp ./bazel_src/scripts/zsh_completion/_bazel $out/share/zsh/site-functions/
+  '';
+
+  doInstallCheck = true;
+  installCheckPhase = ''
+    export TEST_TMPDIR=$(pwd)
+
+    hello_test () {
+      $out/bin/bazel test --distdir=${distDir} \
+        --test_output=errors \
+        --java_toolchain='${javaToolchain}' \
+        examples/cpp:hello-success_test \
+        examples/java-native/src/test/java/com/example/myproject:hello
+    }
+
+    cd ./bazel_src
+
+    # test whether $WORKSPACE_ROOT/tools/bazel works
+
+    mkdir -p tools
+    cat > tools/bazel <<"EOF"
+    #!${runtimeShell} -e
+    exit 1
+    EOF
+    chmod +x tools/bazel
+
+    # first call should fail if tools/bazel is used
+    ! hello_test
+
+    cat > tools/bazel <<"EOF"
+    #!${runtimeShell} -e
+    exec "$BAZEL_REAL" "$@"
+    EOF
+
+    # second call succeeds because it defers to $out/bin/bazel-real
+    hello_test
+  '';
+
+  # Save paths to hardcoded dependencies so Nix can detect them.
+  postFixup = ''
+    mkdir -p $out/nix-support
+    echo "${customBash} ${defaultShellPath}" >> $out/nix-support/depends
+    # The templates get tar’d up into a .jar,
+    # so nix can’t detect python is needed in the runtime closure
+    # Some of the scripts explicitly depend on Python 2.7. Otherwise, we
+    # default to using python3. Therefore, both python27 and python3 are
+    # runtime dependencies.
+    echo "${python27}" >> $out/nix-support/depends
+    echo "${python3}" >> $out/nix-support/depends
+  '' + lib.optionalString stdenv.isDarwin ''
+    echo "${cctools}" >> $out/nix-support/depends
+  '';
+
+  dontStrip = true;
+  dontPatchELF = true;
+}
--- a/pkgs/development/tools/build-managers/bazel/bazel_0_29/glibc.patch
+++ b/pkgs/development/tools/build-managers/bazel/bazel_0_29/glibc.patch
@ -0,0 +1,78 @@
+From https://github.com/grpc/grpc/commit/57586a1ca7f17b1916aed3dea4ff8de872dbf853
+From: Benjamin Peterson <benjamin@dropbox.com>
+Date: Fri, 3 May 2019 08:11:00 -0700
+Subject: [PATCH] Rename gettid() functions.
+
+glibc 2.30 will declare its own gettid; see https://sourceware.org/git/?p=glibc.git;a=commit;h=1d0fc213824eaa2a8f8c4385daaa698ee8fb7c92. Rename the grpc versions to avoid naming conflicts.
+---
+ src/core/lib/gpr/log_linux.cc          | 6 ++----
+ src/core/lib/gpr/log_posix.cc          | 4 ++--
+ src/core/lib/iomgr/ev_epollex_linux.cc | 4 ++--
+ 3 files changed, 6 insertions(+), 8 deletions(-)
+
+diff --git a/third_party/grpc/src/core/lib/gpr/log_linux.cc b/src/core/lib/gpr/log_linux.cc
+index 81026e5689b..8b597b4cf2f 100644
+--- a/third_party/grpc/src/core/lib/gpr/log_linux.cc
+++ b/third_party/grpc/src/core/lib/gpr/log_linux.cc
+@@ -40,7 +40,7 @@
+ #include <time.h>
+ #include <unistd.h>
+
+-static long gettid(void) { return syscall(__NR_gettid); }
+static long sys_gettid(void) { return syscall(__NR_gettid); }
+
+ void gpr_log(const char* file, int line, gpr_log_severity severity,
+              const char* format, ...) {
+@@ -70,7 +70,7 @@ void gpr_default_log(gpr_log_func_args* args) {
+   gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
+   struct tm tm;
+   static __thread long tid = 0;
+-  if (tid == 0) tid = gettid();
+  if (tid == 0) tid = sys_gettid();
+
+   timer = static_cast<time_t>(now.tv_sec);
+   final_slash = strrchr(args->file, '/');
+diff --git a/third_party/grpc/src/core/lib/gpr/log_posix.cc b/src/core/lib/gpr/log_posix.cc
+index b6edc14ab6b..2f7c6ce3760 100644
+--- a/third_party/grpc/src/core/lib/gpr/log_posix.cc
+++ b/third_party/grpc/src/core/lib/gpr/log_posix.cc
+@@ -31,7 +31,7 @@
+ #include <string.h>
+ #include <time.h>
+
+-static intptr_t gettid(void) { return (intptr_t)pthread_self(); }
+static intptr_t sys_gettid(void) { return (intptr_t)pthread_self(); }
+
+ void gpr_log(const char* file, int line, gpr_log_severity severity,
+              const char* format, ...) {
+@@ -86,7 +86,7 @@ void gpr_default_log(gpr_log_func_args* args) {
+   char* prefix;
+   gpr_asprintf(&prefix, "%s%s.%09d %7" PRIdPTR " %s:%d]",
+                gpr_log_severity_string(args->severity), time_buffer,
+-               (int)(now.tv_nsec), gettid(), display_file, args->line);
+               (int)(now.tv_nsec), sys_gettid(), display_file, args->line);
+
+   fprintf(stderr, "%-70s %s\n", prefix, args->message);
+   gpr_free(prefix);
+diff --git a/third_party/grpc/src/core/lib/iomgr/ev_epollex_linux.cc b/src/core/lib/iomgr/ev_epollex_linux.cc
+index c2d80c08ddb..4a83cb6c215 100644
+--- a/third_party/grpc/src/core/lib/iomgr/ev_epollex_linux.cc
+++ b/third_party/grpc/src/core/lib/iomgr/ev_epollex_linux.cc
+@@ -1077,7 +1077,7 @@ static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
+ }
+
+ #ifndef NDEBUG
+-static long gettid(void) { return syscall(__NR_gettid); }
+static long sys_gettid(void) { return syscall(__NR_gettid); }
+ #endif
+
+ /* pollset->mu lock must be held by the caller before calling this.
+@@ -1097,7 +1097,7 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
+ #define WORKER_PTR (&worker)
+ #endif
+ #ifndef NDEBUG
+-  WORKER_PTR->originator = gettid();
+  WORKER_PTR->originator = sys_gettid();
+ #endif
+   if (GRPC_TRACE_FLAG_ENABLED(grpc_polling_trace)) {
+     gpr_log(GPR_INFO,
--- a/pkgs/development/tools/build-managers/bazel/bazel_0_29/src-deps.json
+++ b/pkgs/development/tools/build-managers/bazel/bazel_0_29/src-deps.json
@ -0,0 +1,506 @@
+{
+    "0.16.2.zip": {
+        "name": "0.16.2.zip",
+        "sha256": "9b72bb0aea72d7cbcfc82a01b1e25bf3d85f791e790ddec16c65e2d906382ee0",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/rules_nodejs/archive/0.16.2.zip",
+            "https://github.com/bazelbuild/rules_nodejs/archive/0.16.2.zip"
+        ]
+    },
+    "0.27.1.tar.gz": {
+        "name": "0.27.1.tar.gz",
+        "sha256": "28cb3666da80fbc62d4c46814f5468dd5d0b59f9064c0b933eee3140d706d330",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/0.27.1.tar.gz",
+            "https://github.com/bazelbuild/bazel-toolchains/archive/0.27.1.tar.gz"
+        ]
+    },
+    "0d5f3f2768c6ca2faca0079a997a97ce22997a0c.zip": {
+        "name": "0d5f3f2768c6ca2faca0079a997a97ce22997a0c.zip",
+        "sha256": "36fa66d4d49debd71d05fba55c1353b522e8caef4a20f8080a3d17cdda001d89",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/rules_cc/archive/0d5f3f2768c6ca2faca0079a997a97ce22997a0c.zip",
+            "https://github.com/bazelbuild/rules_cc/archive/0d5f3f2768c6ca2faca0079a997a97ce22997a0c.zip"
+        ]
+    },
+    "41c28e43dffbae39c52dd4b91932d1209e5a8893.tar.gz": {
+        "name": "41c28e43dffbae39c52dd4b91932d1209e5a8893.tar.gz",
+        "sha256": "fdc34621839104b57363a258eab9d821b02ff7837923cfe7fb6fd67182780829",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/skydoc/archive/41c28e43dffbae39c52dd4b91932d1209e5a8893.tar.gz",
+            "https://github.com/bazelbuild/skydoc/archive/41c28e43dffbae39c52dd4b91932d1209e5a8893.tar.gz"
+        ]
+    },
+    "441afe1bfdadd6236988e9cac159df6b5a9f5a98.zip": {
+        "name": "441afe1bfdadd6236988e9cac159df6b5a9f5a98.zip",
+        "sha256": "a07fe5e75964361885db725039c2ba673f0ee0313d971ae4f50c9b18cd28b0b5",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/platforms/archive/441afe1bfdadd6236988e9cac159df6b5a9f5a98.zip",
+            "https://github.com/bazelbuild/platforms/archive/441afe1bfdadd6236988e9cac159df6b5a9f5a98.zip"
+        ]
+    },
+    "7cf3cefd652008d0a64a419c34c13bdca6c8f178.zip": {
+        "name": "7cf3cefd652008d0a64a419c34c13bdca6c8f178.zip",
+        "sha256": "bc81f1ba47ef5cc68ad32225c3d0e70b8c6f6077663835438da8d5733f917598",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/rules_java/archive/7cf3cefd652008d0a64a419c34c13bdca6c8f178.zip",
+            "https://github.com/bazelbuild/rules_java/archive/7cf3cefd652008d0a64a419c34c13bdca6c8f178.zip"
+        ]
+    },
+    "8ccf4f1c351928b55d5dddf3672e3667f6978d60.tar.gz": {
+        "name": "8ccf4f1c351928b55d5dddf3672e3667f6978d60.tar.gz",
+        "sha256": "d868ce50d592ef4aad7dec4dd32ae68d2151261913450fac8390b3fd474bb898",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/rules_sass/archive/8ccf4f1c351928b55d5dddf3672e3667f6978d60.tar.gz",
+            "https://github.com/bazelbuild/rules_sass/archive/8ccf4f1c351928b55d5dddf3672e3667f6978d60.tar.gz"
+        ]
+    },
+    "android_tools_pkg-0.8.tar.gz": {
+        "name": "android_tools_pkg-0.8.tar.gz",
+        "sha256": "a9eac6e1b27d5549edaaa724b20eb1cdae6253b84f44d5744c30372bd523cfcd",
+        "urls": [
+            "https://mirror.bazel.build/bazel_android_tools/android_tools_pkg-0.8.tar.gz"
+        ]
+    },
+    "b0cc14be5da05168b01db282fe93bdf17aa2b9f4.tar.gz": {
+        "name": "b0cc14be5da05168b01db282fe93bdf17aa2b9f4.tar.gz",
+        "sha256": "88b0a90433866b44bb4450d4c30bc5738b8c4f9c9ba14e9661deb123f56a833d",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/rules_proto/archive/b0cc14be5da05168b01db282fe93bdf17aa2b9f4.tar.gz",
+            "https://github.com/bazelbuild/rules_proto/archive/b0cc14be5da05168b01db282fe93bdf17aa2b9f4.tar.gz"
+        ]
+    },
+    "bazel_j2objc": {
+        "name": "bazel_j2objc",
+        "sha256": "8d3403b5b7db57e347c943d214577f6879e5b175c2b59b7e075c0b6453330e9b",
+        "strip_prefix": "j2objc-2.5",
+        "urls": [
+            "https://miirror.bazel.build/github.com/google/j2objc/releases/download/2.5/j2objc-2.5.zip",
+            "https://github.com/google/j2objc/releases/download/2.5/j2objc-2.5.zip"
+        ]
+    },
+    "bazel_skylib": {
+        "name": "bazel_skylib",
+        "sha256": "ba5d15ca230efca96320085d8e4d58da826d1f81b444ef8afccd8b23e0799b52",
+        "strip_prefix": "bazel-skylib-f83cb8dd6f5658bc574ccd873e25197055265d1c",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/archive/f83cb8dd6f5658bc574ccd873e25197055265d1c.tar.gz",
+            "https://github.com/bazelbuild/bazel-skylib/archive/f83cb8dd6f5658bc574ccd873e25197055265d1c.tar.gz"
+        ]
+    },
+    "bazel_toolchains": {
+        "name": "bazel_toolchains",
+        "sha256": "28cb3666da80fbc62d4c46814f5468dd5d0b59f9064c0b933eee3140d706d330",
+        "strip_prefix": "bazel-toolchains-0.27.1",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/0.27.1.tar.gz",
+            "https://github.com/bazelbuild/bazel-toolchains/archive/0.27.1.tar.gz"
+        ]
+    },
+    "build_bazel_rules_nodejs": {
+        "name": "build_bazel_rules_nodejs",
+        "sha256": "9b72bb0aea72d7cbcfc82a01b1e25bf3d85f791e790ddec16c65e2d906382ee0",
+        "strip_prefix": "rules_nodejs-0.16.2",
+        "urls": [
+            "https://mirror.bazel.build/github.com/bazelbuild/rules_nodejs/archive/0.16.2.zip",
+            "https://github.com/bazelbuild/rules_nodejs/archive/0.16.2.zip"
+        ]
+    },
+    "com_google_googletest": {
+        "name": "com_google_googletest",
+        "sha256": "0fb00ff413f6b9b80ccee44a374ca7a18af7315aea72a43c62f2acd1ca74e9b5",
+        "strip_prefix": "googletest-f13bbe2992d188e834339abe6f715b2b2f840a77",
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+        "name": "zulu10.2+3-jdk10.0.1-win_x64-allmodules.zip",
+        "sha256": "c39e7700a8d41794d60985df5a20352435196e78ecbc6a2b30df7be8637bffd5",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu10.2+3-jdk10.0.1/zulu10.2+3-jdk10.0.1-win_x64-allmodules.zip"
+        ]
+    },
+    "zulu11.2.3-jdk11.0.1-linux_x64.tar.gz": {
+        "name": "zulu11.2.3-jdk11.0.1-linux_x64.tar.gz",
+        "sha256": "232b1c3511f0d26e92582b7c3cc363be7ac633e371854ca2f2e9f2b50eb72a75",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu11.2.3-jdk11.0.1/zulu11.2.3-jdk11.0.1-linux_x64.tar.gz"
+        ]
+    },
+    "zulu11.2.3-jdk11.0.1-macosx_x64.tar.gz": {
+        "name": "zulu11.2.3-jdk11.0.1-macosx_x64.tar.gz",
+        "sha256": "1edf366ee821e5db8e348152fcb337b28dfd6bf0f97943c270dcc6747cedb6cb",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu11.2.3-jdk11.0.1/zulu11.2.3-jdk11.0.1-macosx_x64.tar.gz"
+        ]
+    },
+    "zulu11.2.3-jdk11.0.1-win_x64.zip": {
+        "name": "zulu11.2.3-jdk11.0.1-win_x64.zip",
+        "sha256": "8e1e2b8347de6746f3fd1538840dd643201533ab113abc4ed93678e342d28aa3",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu11.2.3-jdk11.0.1/zulu11.2.3-jdk11.0.1-win_x64.zip"
+        ]
+    },
+    "zulu11.29.3-ca-jdk11.0.2-linux_x64.tar.gz": {
+        "name": "zulu11.29.3-ca-jdk11.0.2-linux_x64.tar.gz",
+        "sha256": "f3f44b6235508e87b760bf37a49e186cc1fa4e9cd28384c4dbf5a33991921e08",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu11.29.3-ca-jdk11.0.2/zulu11.29.3-ca-jdk11.0.2-linux_x64.tar.gz"
+        ]
+    },
+    "zulu11.29.3-ca-jdk11.0.2-macosx_x64.zip": {
+        "name": "zulu11.29.3-ca-jdk11.0.2-macosx_x64.zip",
+        "sha256": "059f8e3484bf07b63a8f2820d5f528f473eff1befdb1896ee4f8ff06be3b8d8f",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu11.29.3-ca-jdk11.0.2/zulu11.29.3-ca-jdk11.0.2-macosx_x64.zip"
+        ]
+    },
+    "zulu11.29.3-ca-jdk11.0.2-win_x64.zip": {
+        "name": "zulu11.29.3-ca-jdk11.0.2-win_x64.zip",
+        "sha256": "e1f5b4ce1b9148140fae2fcfb8a96d1c9b7eac5b8df0e13fbcad9b8561284880",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu11.29.3-ca-jdk11.0.2/zulu11.29.3-ca-jdk11.0.2-win_x64.zip"
+        ]
+    },
+    "zulu11.31.15-ca-jdk11.0.3-linux_aarch64.tar.gz": {
+        "name": "zulu11.31.15-ca-jdk11.0.3-linux_aarch64.tar.gz",
+        "sha256": "3b0d91611b1bdc4d409afcf9eab4f0e7f4ae09f88fc01bd9f2b48954882ae69b",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu11.31.15-ca-jdk11.0.3/zulu11.31.15-ca-jdk11.0.3-linux_aarch64.tar.gz"
+        ]
+    },
+    "zulu9.0.7.1-jdk9.0.7-linux_x64-allmodules.tar.gz": {
+        "name": "zulu9.0.7.1-jdk9.0.7-linux_x64-allmodules.tar.gz",
+        "sha256": "f27cb933de4f9e7fe9a703486cf44c84bc8e9f138be0c270c9e5716a32367e87",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu-9.0.7.1-jdk9.0.7/zulu9.0.7.1-jdk9.0.7-linux_x64-allmodules.tar.gz"
+        ]
+    },
+    "zulu9.0.7.1-jdk9.0.7-macosx_x64-allmodules.tar.gz": {
+        "name": "zulu9.0.7.1-jdk9.0.7-macosx_x64-allmodules.tar.gz",
+        "sha256": "404e7058ff91f956612f47705efbee8e175a38b505fb1b52d8c1ea98718683de",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu-9.0.7.1-jdk9.0.7/zulu9.0.7.1-jdk9.0.7-macosx_x64-allmodules.tar.gz"
+        ]
+    },
+    "zulu9.0.7.1-jdk9.0.7-win_x64-allmodules.zip": {
+        "name": "zulu9.0.7.1-jdk9.0.7-win_x64-allmodules.zip",
+        "sha256": "e738829017f107e7a7cd5069db979398ec3c3f03ef56122f89ba38e7374f63ed",
+        "urls": [
+            "https://mirror.bazel.build/openjdk/azul-zulu-9.0.7.1-jdk9.0.7/zulu9.0.7.1-jdk9.0.7-win_x64-allmodules.zip"
+        ]
+    }
+}
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@ -9874,7 +9874,18 @@ in
    stdenv = if stdenv.cc.isClang then llvmPackages_6.stdenv else stdenv;
  };

-  bazel_0 = callPackage ../development/tools/build-managers/bazel/bazel_0 {
+  bazel_0 = bazel_0_26;
+
+  bazel_0_26 = callPackage ../development/tools/build-managers/bazel/bazel_0_26 {
+    inherit (darwin) cctools;
+    inherit (darwin.apple_sdk.frameworks) CoreFoundation CoreServices Foundation;
+    buildJdk = jdk8;
+    buildJdkName = "jdk8";
+    runJdk = jdk11_headless;
+    stdenv = if stdenv.cc.isClang then llvmPackages_6.stdenv else stdenv;
+  };
+
+  bazel_0_29 = callPackage ../development/tools/build-managers/bazel/bazel_0_29 {
    inherit (darwin) cctools;
    inherit (darwin.apple_sdk.frameworks) CoreFoundation CoreServices Foundation;
    buildJdk = jdk8;
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@ -6721,21 +6721,39 @@ in {

  zerobin = callPackage ../development/python-modules/zerobin { };

-  tensorflow-estimator = callPackage ../development/python-modules/tensorflow-estimator { };
-  tensorflow-estimator_1_15_1 = callPackage ../development/python-modules/tensorflow-estimator/1_15_1.nix { };
+  tensorflow-estimator = self.tensorflow-estimator_1;
+
+  tensorflow-estimator_1 = callPackage ../development/python-modules/tensorflow-estimator/1 { };
+
+  tensorflow-estimator_2 = callPackage ../development/python-modules/tensorflow-estimator/2 { };

  tensorflow-probability = callPackage ../development/python-modules/tensorflow-probability { };

-  tensorflow-tensorboard = callPackage ../development/python-modules/tensorflow-tensorboard { };
+  tensorflow-tensorboard = self.tensorflow-tensorboard_1;

-  tensorflow-bin = callPackage ../development/python-modules/tensorflow/bin.nix {
+  tensorflow-tensorboard_1 = callPackage ../development/python-modules/tensorflow-tensorboard/1 { };
+
+  tensorflow-tensorboard_2 = callPackage ../development/python-modules/tensorflow-tensorboard/2 { };
+
+  tensorflow-bin = self.tensorflow-bin_1;
+
+  tensorflow-bin_1 = callPackage ../development/python-modules/tensorflow/1/bin.nix {
    cudaSupport = pkgs.config.cudaSupport or false;
    inherit (pkgs.linuxPackages) nvidia_x11;
    cudatoolkit = pkgs.cudatoolkit_10;
    cudnn = pkgs.cudnn_cudatoolkit_10;
  };

-  tensorflow-build = callPackage ../development/python-modules/tensorflow {
+  tensorflow-bin_2 = callPackage ../development/python-modules/tensorflow/2/bin.nix {
+    cudaSupport = pkgs.config.cudaSupport or false;
+    inherit (pkgs.linuxPackages) nvidia_x11;
+    cudatoolkit = pkgs.cudatoolkit_10;
+    cudnn = pkgs.cudnn_cudatoolkit_10;
+  };
+
+  tensorflow-build = self.tensorflow-build_1;
+
+  tensorflow-build_1 = callPackage ../development/python-modules/tensorflow/1 {
    cudaSupport = pkgs.config.cudaSupport or false;
    inherit (pkgs.linuxPackages) nvidia_x11;
    cudatoolkit = pkgs.cudatoolkit_10;
@ -6745,7 +6763,19 @@ in {
    inherit (pkgs.darwin.apple_sdk.frameworks) Foundation Security;
  };

-  tensorflow = self.tensorflow-build;
+  tensorflow-build_2 = callPackage ../development/python-modules/tensorflow/2 {
+    cudaSupport = pkgs.config.cudaSupport or false;
+    inherit (pkgs.linuxPackages) nvidia_x11;
+    cudatoolkit = pkgs.cudatoolkit_10;
+    cudnn = pkgs.cudnn_cudatoolkit_10;
+    nccl = pkgs.nccl_cudatoolkit_10;
+    openssl = pkgs.openssl_1_1;
+    inherit (pkgs.darwin.apple_sdk.frameworks) Foundation Security;
+  };
+
+  tensorflow = self.tensorflow_1;
+  tensorflow_1 = self.tensorflow-build_1;
+  tensorflow_2 = self.tensorflow-build_2;

  tensorflowWithoutCuda = self.tensorflow.override {
    cudaSupport = false;