diff --git a/pkgs/desktops/gnome-2.28/platform/GConf/default.nix b/pkgs/desktops/gnome-2.28/platform/GConf/default.nix
index e8d9dd365506..bb6cf422bf71 100644
--- a/pkgs/desktops/gnome-2.28/platform/GConf/default.nix
+++ b/pkgs/desktops/gnome-2.28/platform/GConf/default.nix
@@ -7,6 +7,11 @@ stdenv.mkDerivation {
     url = mirror://gnome/sources/GConf/2.28/GConf-2.28.0.tar.bz2;
     sha256 = "1j3ah0f71yv4di3fvv1aahcjvqfwsxw2m71ljbjq0apv5gzdqmyh";
   };
+
+  preConfigure = ''
+    export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${dbus_glib}/include/dbus-1.0 -I${policykit}/include/PolicyKit -I${glib}/include/glib-2.0"
+  '';
+
   buildInputs = [ pkgconfig glib gtk dbus_glib ORBit2 libxml2
                   expat policykit intltool ];
 }