diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e74ce017..cab1f580 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: cachix/install-nix-action@v20
         with:
-          nix_path: nixpkgs=channel:nixos-unstable
+          nix_path: nixpkgs=channel:nixos-23.05
           extra_nix_config: |
             accept-flake-config = true
       - uses: cachix/cachix-action@v12