diff --git a/.github/workflows/basic-eval.yml b/.github/workflows/basic-eval.yml
index b7bbbd40b451..c5e17faea865 100644
--- a/.github/workflows/basic-eval.yml
+++ b/.github/workflows/basic-eval.yml
@@ -15,6 +15,6 @@ jobs:
     # we don't limit this action to only NixOS repo since the checks are cheap and useful developer feedback
     steps:
     - uses: actions/checkout@v2
-    - uses: cachix/install-nix-action@v14
+    - uses: cachix/install-nix-action@v15
     # explicit list of supportedSystems is needed until aarch64-darwin becomes part of the trunk jobset
     - run: nix-build pkgs/top-level/release.nix -A tarball.nixpkgs-basic-release-checks --arg supportedSystems '[ "aarch64-darwin" "aarch64-linux" "x86_64-linux" "x86_64-darwin"  ]'
diff --git a/.github/workflows/editorconfig.yml b/.github/workflows/editorconfig.yml
index 1934a24c65af..c0303ca80b9d 100644
--- a/.github/workflows/editorconfig.yml
+++ b/.github/workflows/editorconfig.yml
@@ -28,7 +28,7 @@ jobs:
         # pull_request_target checks out the base branch by default
         ref: refs/pull/${{ github.event.pull_request.number }}/merge
       if: env.PR_DIFF
-    - uses: cachix/install-nix-action@v14
+    - uses: cachix/install-nix-action@v15
       if: env.PR_DIFF
       with:
         # nixpkgs commit is pinned so that it doesn't break
diff --git a/.github/workflows/manual-nixos.yml b/.github/workflows/manual-nixos.yml
index 01bbe1b12bf2..e134f263c884 100644
--- a/.github/workflows/manual-nixos.yml
+++ b/.github/workflows/manual-nixos.yml
@@ -18,7 +18,7 @@ jobs:
         with:
           # pull_request_target checks out the base branch by default
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v14
+      - uses: cachix/install-nix-action@v15
         with:
           # explicitly enable sandbox
           extra_nix_config: sandbox = true
diff --git a/.github/workflows/manual-nixpkgs.yml b/.github/workflows/manual-nixpkgs.yml
index d0c3f5959157..6866bc3af61a 100644
--- a/.github/workflows/manual-nixpkgs.yml
+++ b/.github/workflows/manual-nixpkgs.yml
@@ -18,7 +18,7 @@ jobs:
         with:
           # pull_request_target checks out the base branch by default
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v14
+      - uses: cachix/install-nix-action@v15
         with:
           # explicitly enable sandbox
           extra_nix_config: sandbox = true
diff --git a/.github/workflows/nixos-manual.yml b/.github/workflows/nixos-manual.yml
index 70f61a1a3a88..eade07427d39 100644
--- a/.github/workflows/nixos-manual.yml
+++ b/.github/workflows/nixos-manual.yml
@@ -19,7 +19,7 @@ jobs:
       with:
         # pull_request_target checks out the base branch by default
         ref: refs/pull/${{ github.event.pull_request.number }}/merge
-    - uses: cachix/install-nix-action@v14
+    - uses: cachix/install-nix-action@v15
     - name: Check DocBook files generated from Markdown are consistent
       run: |
         nixos/doc/manual/md-to-db.sh