anchor.diff:  
         wrapProgram $out/bin/mutter \
           --set 'GI_TYPELIB_PATH' "$GI_TYPELIB_PATH" \
  +        --set 'GSETTINGS_BACKEND' 'dconf' \
  +        --prefix 'GIO_EXTRA_MODULES' : "$GIO_EXTRA_MODULES" \
  +        --prefix 'XDG_DATA_DIRS' : "$GSETTINGS_SCHEMAS_PATH" \
           --prefix 'XDG_DATA_DIRS' : "$out/share" \
  -        --prefix 'XDG_DATA_DIRS' : "$GSETTINGS_SCHEMAS_PATH"
  +        --prefix 'XDG_DATA_DIRS' : "$XDG_ICON_DIRS"
       '';
   
     meta = with stdenv.lib; {
  
positive.code:     gettext
      intltool
      libtool
    ];
  
    buildInputs = [
  
negative.code:     cairo
      clutter
      cogl
      dconf
      gdk-pixbuf
      geocode-glib
      glib
      gnome-desktop
      gnome-settings-daemon
      gobject-introspection
      gsettings-desktop-schemas
      gtk3
  