diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bfb606f..8f203d2 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,6 +19,7 @@ jobs:
       - name: Install Nix
         uses: cachix/install-nix-action@v18
         with:
+          install_url: https://releases.nixos.org/nix/nix-2.13.3/install
           extra_nix_config: |
             experimental-features = nix-command flakes