libayatana-indicator: fix cross compilation

pkgs/by-name/li/libayatana-indicator/package.nix

@@ -2,6 +2,7 @@
   ayatana-ido,
   cmake,
   fetchFromGitHub,
+  glib,
   gtk3,
   lib,
   pkg-config,
@@ -21,6 +22,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cmake
+    glib # for glib-mkenums
     pkg-config
   ];
 
@@ -28,6 +30,8 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ ayatana-ido ];
 
+  strictDeps = true;
+
   meta = with lib; {
     description = "Ayatana Indicators Shared Library";
     homepage = "https://github.com/AyatanaIndicators/libayatana-indicator";