self: super:
{
  gnome = super.gnome.overrideScope' (gself: gsuper: {
    mutter = gsuper.mutter.overrideAttrs (oldAttrs: {
      src = super.fetchurl {
        url = "https://gitlab.gnome.org/Community/Ubuntu/mutter/-/archive/triple-buffering-v4-46/mutter-triple-buffering-v4-46.tar.gz";
        sha256 = "Rdao3TR6wG7YcpoD+nFFiCaE+97G0MreBgwsQJa3GCE=";
      };
    });
  });
}