diff --git a/.github/workflows/build-host.yml b/.github/workflows/build-host.yml
index e280c8e..392691a 100644
--- a/.github/workflows/build-host.yml
+++ b/.github/workflows/build-host.yml
@@ -17,11 +17,11 @@ jobs:
       matrix:
         host: ${{ fromJson(inputs.hosts) }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v5
       - uses: cachix/install-nix-action@v31
         with:
           extra_nix_config: experimental-features = nix-command flakes pipe-operators
-      - uses: cachix/cachix-action@v16
+      - uses: cachix/cachix-action@v15
         with:
           name: sebastian-stork
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bbcc665..6457516 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
       servers: ${{ steps.servers.outputs.servers }}
       workstations: ${{ steps.workstations.outputs.workstations }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v5
       - uses: cachix/install-nix-action@v31
         with:
           extra_nix_config: experimental-features = nix-command flakes pipe-operators
@@ -56,11 +56,11 @@ jobs:
       matrix:
         package: ${{ fromJson(needs.parse-flake.outputs.packages) }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v5
       - uses: cachix/install-nix-action@v31
         with:
           extra_nix_config: experimental-features = nix-command flakes pipe-operators
-      - uses: cachix/cachix-action@v16
+      - uses: cachix/cachix-action@v15
         with:
           name: sebastian-stork
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
@@ -76,11 +76,11 @@ jobs:
       matrix:
         check: ${{ fromJson(needs.parse-flake.outputs.checks) }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v5
       - uses: cachix/install-nix-action@v31
         with:
           extra_nix_config: experimental-features = nix-command flakes pipe-operators
-      - uses: cachix/cachix-action@v16
+      - uses: cachix/cachix-action@v15
         with:
           name: sebastian-stork
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
@@ -108,7 +108,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v5
       - name: Push to deploy branch
         run: git push --force origin HEAD:refs/heads/deploy
   await-deploy:
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 651cc34..1c7bf57 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -7,7 +7,7 @@ jobs:
   update:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v5
         with:
           token: ${{ secrets.PAT }}
       - uses: cachix/install-nix-action@v31