diff -Naur a/Makefile b/Makefile
--- a/Makefile 2009-01-25 15:40:04.000000000 -0600
+++ b/Makefile 2012-09-06 09:02:31.056193204 -0500
@@ -1,4 +1,4 @@
-prefix?=/usr/local
+prefix=$(PREFIX)
sbindir=$(prefix)/sbin
datadir=$(prefix)/share
mandir=$(datadir)/man