nixpkgs

30af0cda - tests.nixpkgs-check-by-name: Test non-Nix invalid symlinks instead

tests.nixpkgs-check-by-name: Test non-Nix invalid symlinks instead Nix symlinks that are invalid don't pass the new CI check from https://github.com/NixOS/nixpkgs/pull/279892, so let's instead use non-Nix symlinks.