--- Makefile.orig	2014-06-20 00:12:17.290047513 +0800
+++ Makefile	2014-06-20 00:12:43.436059870 +0800
@@ -4,8 +4,8 @@ rtfm: rtfm.c
 	${CC} -o rtfm rtfm.c ${CFLAGS} ${LDFLAGS}
 
 install: rtfm
-	install -c -s -o root -g wheel -m 0755 rtfm /usr/local/bin
-	install -c -o root -g wheel -m 0644 rtfm.1 ${PREFIX}/man/man1
+	$(BSD_INSTALL_PROGRAM) rtfm $(DESTDIR)${PREFIX}/bin
+	$(BSD_INSTALL_MAN) rtfm.1 $(DESTDIR)${PREFIX}/man/man1
 
 clean:
 	rm -f rtfm