--- waf-light.orig	2010-11-25 11:11:50.000000000 +0100
+++ waf-light	2011-01-15 15:22:53.485315375 +0100
@@ -145,6 +145,9 @@
 		w = test(i + '/lib/' + dirname)
 		if w: return w
 
+	w = test('/usr/share/%s' % WAF)
+	if w: return w
+
 	#waf-local
 	dir = join(base, (sys.platform != 'win32' and '.' or '') + dirname)
 	w = test(dir)