anchor.diff: -{ stdenv, fetchFromGitHub, gtk3, pythonPackages, intltool,
  -  pango, gsettings-desktop-schemas,
  +{ stdenv, fetchFromGitHub, gtk3, pythonPackages, intltool, gnome3,
  +  pango, gsettings-desktop-schemas, gobjectIntrospection, wrapGAppsHook,
   # Optional packages:
    enableOSM ? true, osm-gps-map
    }:
  
positive.code:     runHook postInstall
    '';
  
    # gobjectIntrospection package, wrap accordingly
    preFixup = ''
      wrapProgram $out/bin/gramps \
        --prefix GI_TYPELIB_PATH : "$GI_TYPELIB_PATH" \
        --prefix XDG_DATA_DIRS : "$GSETTINGS_SCHEMAS_PATH:$out/share"
    '';
  
    meta = with stdenv.lib; {
      description = "Genealogy software";
      homepage = http://gramps-project.org;
  
negative.code:     sha256 = "0k0bx6msc2kvkg0nwa9v2mp3qy7lmnxjd97n6a1zdzlq8yzw29f1";
    };
  
    pythonPath = with pythonPackages; [ bsddb3 PyICU pygobject3 pycairo ];
  
    # Same installPhase as in buildPythonApplication but without --old-and-unmanageble
    # install flag.
  