25| let
           26|   throwUnsupportedSystem = throw "Unsupported system: ${stdenv.hostPlatform.system}";
             |                            ^
           27| in

       error: Unsupported system: aarch64-darwin

Cannot nix-instantiate `gnat14.passthru.tests` because:
error: attribute 'tests' in selection path 'gnat14.passthru.tests' not found