--- Makefile.orig	2014-02-11 16:45:41.000000000 -0200
+++ Makefile	2014-02-11 16:46:25.000000000 -0200
@@ -10,7 +10,7 @@
 ETHERS?=/etc/ethers
 
 ## FreeBSD
-LOCALBASE=/usr/local
+LOCALBASE?=/usr/local
 LIBNET_CONFIG=libnet11-config
 
 ## OpenBSD (tested by irix)
@@ -26,7 +26,7 @@
 DEFINES=`${LIBNET_CONFIG} --defines`
 
 STATIC=
-CC=gcc
+CC?=gcc
 
 CFLAGS+=-g -Wall -DETHERS='"$(ETHERS)"'
 
@@ -58,10 +58,10 @@
 	@rm -f $(NAME)
 
 install: all
-	mkdir -p -m 755 $(PREFIX)/sbin
-	install -s -m 755 $(NAME) $(PREFIX)/sbin/$(NAME)
-	mkdir -p -m 755 $(PREFIX)/man/man8
-	install -m 644 doc/$(NAME).8 $(PREFIX)/man/man8/$(NAME).8
+	mkdir -p -m 755 ${DESTDIR}$(PREFIX)/sbin
+	install -s -m 755 $(NAME) ${DESTDIR}$(PREFIX)/sbin/$(NAME)
+	mkdir -p -m 755 ${DESTDIR}$(PREFIX)/man/man8
+	install -m 644 doc/$(NAME).8 ${DESTDIR}$(PREFIX)/man/man8/$(NAME).8
 
 uninstall: deinstall