fixup! tools: improve nix-changes coverage

Author: aduh95

.github/workflows/nix-changes.yml

@@ -54,6 +54,8 @@ jobs:
             '*.nix'
           sparse-checkout-cone-mode: false
 
+      - run: ls; ls tools/nix
+
       - uses: cachix/install-nix-action@630ae543ea3a38a9a4166f03376c02c50f408342  # v31.11.0
         with:
           extra_nix_config: sandbox = true