--- Makefile.orig	2014-06-20 14:07:17.225595274 +0800
+++ Makefile	2014-06-20 14:07:25.329596116 +0800
@@ -9,7 +9,7 @@ LDFLAGS += -pipe -L.
 all:	libsmacker.so
 
 install:	libsmacker.so
-	cp libsmacker.so ${PREFIX}/lib/libsmacker.so
+	cp libsmacker.so $(DESTDIR)${PREFIX}/lib/libsmacker.so
 
 uninstall:	libsmacker.so
 	rm -f ${PREFIX}/lib/libsmacker.so