diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index bbfc1c66..261b0bf5 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -17,9 +17,9 @@ jobs:
       contents: "read"
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@main
-      - uses: DeterminateSystems/magic-nix-cache-action@main
-      - uses: DeterminateSystems/flake-checker-action@main
+      - uses: DeterminateSystems/nix-installer-action@v12
+      - uses: DeterminateSystems/magic-nix-cache-action@v7
+      - uses: DeterminateSystems/flake-checker-action@v8
       - run: |
           nix build .#build-os-configurations
           ls -lha result/