gnome3.anjuta: fix gsettings to be runnable at least

pkgs/desktops/gnome-3/3.16/devtools/anjuta/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchurl, pkgconfig, gnome3, gtk3, flex, bison, libxml2, intltool,
-  itstool, python }:
+  itstool, python, makeWrapper }:
 
 let
   major = gnome3.version;
@@ -17,7 +17,13 @@ in stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   buildInputs = [ pkgconfig flex bison gtk3 libxml2 gnome3.gjs gnome3.gdl
-    gnome3.libgda gnome3.gtksourceview intltool itstool python ];
+    gnome3.libgda gnome3.gtksourceview intltool itstool python makeWrapper ];
+
+  preFixup = ''
+    wrapProgram $out/bin/anjuta \
+      --prefix XDG_DATA_DIRS : \
+        "$GSETTINGS_SCHEMAS_PATH"
+  '';
 
   meta = with stdenv.lib; {
     description = "Software development studio";