diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index e1a9a12..d76a64e 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -19,7 +19,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Install Nix
-      uses: cachix/install-nix-action@v27
+      uses: cachix/install-nix-action@14344b39ca74ae462b171571696461d555318cc3
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - name: Build