obconf: add GSettings schemas path

pkgs/tools/X11/obconf/default.nix

@@ -1,5 +1,5 @@
 { lib, stdenv, fetchgit, autoreconfHook, pkg-config, gtk3, openbox,
-  imlib2, libxml2, libstartup_notification, makeWrapper, libSM }:
+  imlib2, libxml2, libstartup_notification, wrapGAppsHook, libSM }:
 
 stdenv.mkDerivation rec {
   pname = "obconf";
@@ -13,8 +13,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     autoreconfHook
-    makeWrapper
     pkg-config
+    wrapGAppsHook
   ];
 
   buildInputs = [
@@ -30,10 +30,6 @@ stdenv.mkDerivation rec {
     substituteInPlace configure.ac --replace 2.0.4 ${version}
   '';
 
-  postInstall = ''
-    wrapProgram $out/bin/obconf --prefix XDG_DATA_DIRS : ${openbox}/share/
-  '';
-
   meta = {
     description = "GUI configuration tool for openbox";
     homepage = "http://openbox.org/wiki/ObConf";