diff --git a/.github/workflows/check-maintainers-sorted.yml b/.github/workflows/check-maintainers-sorted.yml
index dcc4806e9375..3b9b5ee7fba2 100644
--- a/.github/workflows/check-maintainers-sorted.yml
+++ b/.github/workflows/check-maintainers-sorted.yml
@@ -20,7 +20,7 @@ jobs:
             lib
             maintainers
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
diff --git a/.github/workflows/check-nix-format.yml b/.github/workflows/check-nix-format.yml
index 910403e0bb00..8c35196e4944 100644
--- a/.github/workflows/check-nix-format.yml
+++ b/.github/workflows/check-nix-format.yml
@@ -23,7 +23,7 @@ jobs:
         with:
           ref: ${{ needs.get-merge-commit.outputs.mergedSha }}
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
diff --git a/.github/workflows/check-nixf-tidy.yml b/.github/workflows/check-nixf-tidy.yml
index 91a5d4c6c90f..1bb43c746bc5 100644
--- a/.github/workflows/check-nixf-tidy.yml
+++ b/.github/workflows/check-nixf-tidy.yml
@@ -34,7 +34,7 @@ jobs:
           rev=$(jq -r .rev ci/pinned-nixpkgs.json)
           echo "url=https://github.com/NixOS/nixpkgs/archive/$rev.tar.gz" >> "$GITHUB_ENV"
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
           nix_path: nixpkgs=${{ env.url }}
diff --git a/.github/workflows/check-shell.yml b/.github/workflows/check-shell.yml
index 9c02e26be178..d148563c4311 100644
--- a/.github/workflows/check-shell.yml
+++ b/.github/workflows/check-shell.yml
@@ -27,7 +27,7 @@ jobs:
         with:
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
 
       - name: Build shell
         run: nix-build shell.nix
diff --git a/.github/workflows/codeowners-v2.yml b/.github/workflows/codeowners-v2.yml
index 831a58fdd74a..ad190487590a 100644
--- a/.github/workflows/codeowners-v2.yml
+++ b/.github/workflows/codeowners-v2.yml
@@ -45,7 +45,7 @@ jobs:
     needs: get-merge-commit
     if: github.repository_owner == 'NixOS' && needs.get-merge-commit.outputs.mergedSha
     steps:
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
 
       - uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad # v16
         with:
@@ -92,7 +92,7 @@ jobs:
     runs-on: ubuntu-24.04
     if: github.repository_owner == 'NixOS'
     steps:
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
 
       # Important: Because we use pull_request_target, this checks out the base branch of the PR, not the PR head.
       # This is intentional, because we need to request the review of owners as declared in the base branch.
diff --git a/.github/workflows/editorconfig-v2.yml b/.github/workflows/editorconfig-v2.yml
index 436b7c339e8c..c2428ce64e29 100644
--- a/.github/workflows/editorconfig-v2.yml
+++ b/.github/workflows/editorconfig-v2.yml
@@ -32,7 +32,7 @@ jobs:
         with:
           ref: ${{ needs.get-merge-commit.outputs.mergedSha }}
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           # nixpkgs commit is pinned so that it doesn't break
           # editorconfig-checker 2.4.0
diff --git a/.github/workflows/eval-lib-tests.yml b/.github/workflows/eval-lib-tests.yml
index 84d9562c220d..722371ac19a2 100644
--- a/.github/workflows/eval-lib-tests.yml
+++ b/.github/workflows/eval-lib-tests.yml
@@ -22,7 +22,7 @@ jobs:
         with:
           ref: ${{ needs.get-merge-commit.outputs.mergedSha }}
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
diff --git a/.github/workflows/eval.yml b/.github/workflows/eval.yml
index abed73db63e4..77f4a2693674 100644
--- a/.github/workflows/eval.yml
+++ b/.github/workflows/eval.yml
@@ -43,7 +43,7 @@ jobs:
           echo "targetSha=$targetSha" >> "$GITHUB_OUTPUT"
 
       - name: Install Nix
-        uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+        uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
@@ -71,7 +71,7 @@ jobs:
           path: nixpkgs
 
       - name: Install Nix
-        uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+        uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
@@ -111,7 +111,7 @@ jobs:
           path: nixpkgs
 
       - name: Install Nix
-        uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+        uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
@@ -152,7 +152,7 @@ jobs:
           path: nixpkgs
 
       - name: Install Nix
-        uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+        uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
@@ -260,7 +260,7 @@ jobs:
           path: comparison
 
       - name: Install Nix
-        uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+        uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
 
       # Important: This workflow job runs with extra permissions,
       # so we need to make sure to not run untrusted code from PRs
diff --git a/.github/workflows/keep-sorted.yml b/.github/workflows/keep-sorted.yml
index b23295a23af4..ed334e961ab4 100644
--- a/.github/workflows/keep-sorted.yml
+++ b/.github/workflows/keep-sorted.yml
@@ -27,7 +27,7 @@ jobs:
           rev=$(jq -r .rev ci/pinned-nixpkgs.json)
           echo "url=https://github.com/NixOS/nixpkgs/archive/$rev.tar.gz" >> "$GITHUB_ENV"
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
           nix_path: nixpkgs=${{ env.url }}
diff --git a/.github/workflows/manual-nixos-v2.yml b/.github/workflows/manual-nixos-v2.yml
index abe8ac3d2d4f..26fa03aba9b4 100644
--- a/.github/workflows/manual-nixos-v2.yml
+++ b/.github/workflows/manual-nixos-v2.yml
@@ -33,7 +33,7 @@ jobs:
         with:
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
diff --git a/.github/workflows/manual-nixpkgs-v2.yml b/.github/workflows/manual-nixpkgs-v2.yml
index 88356e1d229f..a97bd0aac719 100644
--- a/.github/workflows/manual-nixpkgs-v2.yml
+++ b/.github/workflows/manual-nixpkgs-v2.yml
@@ -20,7 +20,7 @@ jobs:
         with:
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
 
diff --git a/.github/workflows/nix-parse-v2.yml b/.github/workflows/nix-parse-v2.yml
index f149dc481ca7..cc988e20bd6e 100644
--- a/.github/workflows/nix-parse-v2.yml
+++ b/.github/workflows/nix-parse-v2.yml
@@ -32,7 +32,7 @@ jobs:
           ref: ${{ needs.get-merge-commit.outputs.mergedSha }}
         if: ${{ env.CHANGED_FILES && env.CHANGED_FILES != '' }}
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
         with:
           extra_nix_config: sandbox = true
           nix_path: nixpkgs=channel:nixpkgs-unstable
diff --git a/.github/workflows/nixpkgs-vet.yml b/.github/workflows/nixpkgs-vet.yml
index b46f926d8cad..80d6ba0b9aba 100644
--- a/.github/workflows/nixpkgs-vet.yml
+++ b/.github/workflows/nixpkgs-vet.yml
@@ -43,7 +43,7 @@ jobs:
           git worktree add "$target" "$(git rev-parse HEAD^1)"
           echo "target=$target" >> "$GITHUB_ENV"
 
-      - uses: cachix/install-nix-action@754537aaedb35f72ab11a60cc162c49ef3016495 # v31
+      - uses: cachix/install-nix-action@526118121621777ccd86f79b04685a9319637641 # v31
 
       - name: Fetching the pinned tool
         # Update the pinned version using ci/nixpkgs-vet/update-pinned-tool.sh