--- a/Makefile	2014-08-11 21:14:07.000000000 +0200
+++ b/Makefile	2017-03-04 04:20:00.000000000 +0100
@@ -1,7 +1,8 @@
 # Makefile for phoon
 
-BINDIR =	/usr/local/bin
-MANDIR =	/usr/local/man/man1
+DESTDIR?=	/usr/local
+BINDIR =	$(DESTDIR)/bin
+MANDIR =	$(DESTDIR)/man/man1
 
 DEFINES =	-DOS_BSD
 #DEFINES =	-DOS_SYSV