diff --git a/pkgs/desktops/gnome-2/platform/gtkglext/default.nix b/pkgs/desktops/gnome-2/platform/gtkglext/default.nix
index ff50bcd5e5cd..de06c671e725 100644
--- a/pkgs/desktops/gnome-2/platform/gtkglext/default.nix
+++ b/pkgs/desktops/gnome-2/platform/gtkglext/default.nix
@@ -9,7 +9,8 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = with xorg;
-    [ pkgconfig glib gtk mesa pango pangox_compat libX11 libXmu ];
+    [ pkgconfig glib gtk mesa pango libX11 libXmu ];
+  propagatedBuildInputs = [ pangox_compat ];
 
   # The library uses `GTK_WIDGET_REALIZED', `GTK_WIDGET_TOPLEVEL', and
   # `GTK_WIDGET_NO_WINDOW', all of which appear to be deprecated nowadays.