diff -up gtk+-2.18.2/gtk/gtk-builder-convert.system-python gtk+-2.18.2/gtk/gtk-builder-convert
--- gtk+-2.18.2/gtk/gtk-builder-convert.system-python	2009-10-13 15:59:50.423385098 -0400
+++ gtk+-2.18.2/gtk/gtk-builder-convert	2009-10-13 16:00:31.876142050 -0400
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 #
 # Copyright (C) 2006-2008 Async Open Source
 #                         Henrique Romano <henrique@async.com.br>