diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 26514c38..4f575eed 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -29,7 +29,7 @@ jobs:
       - name: Run cargo2nix
         shell: bash
         run: |
-          nix run github:cargo2nix/cargo2nix -- -s > Cargo.nix
+          nix run github:cargo2nix/cargo2nix/unstable -- -s > Cargo.nix
 
       - name: Create PR
         uses: peter-evans/create-pull-request@v4