gnome3.gnome-shell: fix libgnomekdb path

pkgs/desktops/gnome-3/core/gnome-shell/default.nix

@@ -59,6 +59,7 @@ in stdenv.mkDerivation rec {
     })
     (substituteAll {
       src = ./fix-paths.patch;
+      inherit (gnome3) libgnomekbd;
       inherit unzip;
     })
   ];

pkgs/desktops/gnome-3/core/gnome-shell/fix-paths.patch

@@ -9,3 +9,14 @@
                                            null,
                                            GLib.SpawnFlags.SEARCH_PATH | GLib.SpawnFlags.DO_NOT_REAP_CHILD,
                                            null);
+--- a/js/ui/status/keyboard.js
++++ b/js/ui/status/keyboard.js
+@@ -1019,7 +1019,7 @@
+         if (xkbVariant.length > 0)
+             description = description + '\t' + xkbVariant;
+ 
+-        Util.spawn(['gkbd-keyboard-display', '-l', description]);
++        Util.spawn(['@libgnomekbd@/bin/gkbd-keyboard-display', '-l', description]);
+     },
+ 
+     _containerGetPreferredWidth: function(container, for_height, alloc) {