anchor.diff:  
     NIX_CFLAGS_COMPILE = optionalString stdenv.isDarwin " -lintl";
   
  -  propagatedBuildInputs = [ dbus dbus_glib glib glib_networking ];
  +  postInstall = ''
  +    sed -i $dev/lib/pkgconfig/libgeoclue-2.0.pc -e "s|includedir=.*|includedir=$dev/include|"
  +  '';
   
     meta = with stdenv.lib; {
       description = "Geolocation framework and some data providers";
  
positive.code:    [ glib json_glib libsoup geoip
       dbus dbus_glib avahi
     ] ++ optionals (!stdenv.isDarwin) [ modemmanager ];
  
    preConfigure = ''
       substituteInPlace configure --replace "-Werror" ""
  
negative.code:     sha256 = "19hfmr8fa1js8ynazdyjxlyrqpjn6m1719ay70ilga4rayxrcyyi";
    };
  
    outputs = [ "out" "dev" ];
  
    nativeBuildInputs = [
      pkgconfig intltool wrapGAppsHook
    ];
  