--- Makefile.PL.orig	2014-11-20 06:51:28.000000000 -0800
+++ Makefile.PL	2014-11-20 07:40:11.000000000 -0800
@@ -1,6 +1,7 @@
 use strict;
 use warnings FATAL => 'all';
 use 5.006;
+use Config;
 
 my %META = (
   name => 'Class-C3',