--- Makefile.orig	2014-07-16 14:15:30.269735497 +0800
+++ Makefile	2014-07-16 14:16:09.749730176 +0800
@@ -1,9 +1,9 @@
-DESTDIR?=/usr/local
+PREFIX?=/usr/local
 
 all:
 	echo "Nothing to make."
 
 install:
-	cp libspigot.a ${DESTDIR}/lib/libspigot.a
-	ranlib libspigot.a
-	cp spigot_saa7191.h /usr/local/include
+	cp libspigot.a $(DESTDIR)${PREFIX}/lib/libspigot.a
+	ranlib $(DESTDIR)${PREFIX}/lib/libspigot.a
+	cp spigot_saa7191.h $(DESTDIR)${PREFIX}/include