fix: skip GTK tests in gjs cross-compile for Hyprland

flake.nix

@@ -116,6 +116,10 @@
                       (flag: !(builtins.isString flag && builtins.match ".*libcamera.*" flag != null))
                       (old.mesonFlags or []) ++ [ "-Dlibcamera=disabled" ];
                   });
+                  # gjs cross-compile fails without GTK; skip intro tests
+                  gjs = prev.gjs.overrideAttrs (old: {
+                    mesonFlags = (old.mesonFlags or []) ++ [ "-Dskip_gtk_tests=true" ];
+                  });
                 })
               ];
             }