$NetBSD: patch-ac,v 1.4 2009/05/31 09:00:48 obache Exp $

Also look at vendor.

--- glib/src/lib/mkmf-gnome2.rb.orig	2008-09-13 11:18:06.000000000 +0000
+++ glib/src/lib/mkmf-gnome2.rb
@@ -257,7 +257,7 @@ def make_version_header(app_name, pkgnam
 end
 
 def check_ruby_func
-  $CPPFLAGS << " -I$(sitearchdir) "
+  $CPPFLAGS << " -I$(vendorarchdir) "
 
   #Other options
   ruby_header = "ruby.h"
