anchor.diff: -{ stdenv, fetchFromGitHub, makeWrapper, automake, autoconf, libtool,
  +{ stdenv, fetchFromGitHub, automake, autoconf, libtool,
     pkgconfig, file, intltool, libxml2, json_glib , sqlite, itstool,
  -  librsvg, vala_0_34, gnome3, wrapGAppsHook
  +  librsvg, vala_0_34, gnome3, wrapGAppsHook, gobjectIntrospection
   }:
   
   stdenv.mkDerivation rec {
  
positive.code:     vala_0_34
      gnome3.yelp_tools
      wrapGAppsHook
    ];
  
    buildInputs = [
  
negative.code:     };
  
    nativeBuildInputs = [
      pkgconfig
      automake autoconf libtool
      file
  