--- Makefile.orig	2005-01-17 05:42:22.000000000 +0800
+++ Makefile	2014-06-09 12:04:06.347905833 +0800
@@ -1,5 +1,5 @@
 # change this to use another location	
-PREFIX=/usr/local
+PREFIX?=/usr/local
 
 BINFILES = netleak netleakd
 CFILES=	netleak.conf netleakd.conf
@@ -10,15 +10,15 @@ main:
 	@echo "type 'make uninstall' to uninstall"
 
 install:
-	@mkdir -p $(PREFIX)/sbin
-	@mkdir -p $(PREFIX)/etc
-	@mkdir -p $(PREFIX)/share/man/man8
-	install netleak $(PREFIX)/sbin
-	install netleakd $(PREFIX)/sbin
-	install netleak.conf $(PREFIX)/etc
-	install netleakd.conf $(PREFIX)/etc
-	install netleak.8 $(PREFIX)/share/man/man8
-	install netleakd.8 $(PREFIX)/share/man/man8
+	@mkdir -p $(DESTDIR)$(PREFIX)/sbin
+	@mkdir -p $(DESTDIR)$(PREFIX)/etc
+	@mkdir -p $(DESTDIR)$(PREFIX)/man/man8
+	install netleak $(DESTDIR)$(PREFIX)/sbin
+	install netleakd $(DESTDIR)$(PREFIX)/sbin
+	install netleak.conf $(DESTDIR)$(PREFIX)/etc/netleak.conf.sample
+	install netleakd.conf $(DESTDIR)$(PREFIX)/etc/netleakd.conf.sample
+	install netleak.8 $(DESTDIR)$(PREFIX)/share/man/man8
+	install netleakd.8 $(DESTDIR)$(PREFIX)/share/man/man8
 
 uninstall:
 	rm -f $(PREFIX)/sbin/netleak