gnome-menus: drop intltool

See: https://gitlab.gnome.org/GNOME/gnome-menus/blob/74771e78de764bcd9d42e6a3e2c6262458355af9/NEWS#L7

pkgs/development/libraries/gnome-menus/default.nix

···
-{ stdenv, fetchurl, intltool, pkgconfig, glib, gobject-introspection }:
+{ stdenv, fetchurl, pkgconfig, glib, gobject-introspection }:
 
 stdenv.mkDerivation rec {
   pname = "gnome-menus";
···
     sha256 = "1iihxcibjg22jxsw3s1cxzcq0rhn1rdmx4xg7qjqij981afs8dr7";
   };
 
-  makeFlags = "INTROSPECTION_GIRDIR=$(out)/share/gir-1.0/ INTROSPECTION_TYPELIBDIR=$(out)/lib/girepository-1.0";
+  makeFlags = [
+    "INTROSPECTION_GIRDIR=${placeholder ''out''}/share/gir-1.0/"
+    "INTROSPECTION_TYPELIBDIR=${placeholder ''out''}/lib/girepository-1.0"
+  ];
 
   nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ intltool glib gobject-introspection ];
+  buildInputs = [ glib gobject-introspection ];
 
   meta = {
     homepage = https://www.gnome.org;