$OpenBSD: patch-Makefile,v 1.3 2011/07/08 18:32:34 dcoppa Exp $
--- Makefile.orig	Wed May 25 12:35:38 2011
+++ Makefile	Fri Jul  8 15:01:18 2011
@@ -1,12 +1,16 @@
 
 DESTDIR =
-PREFIX	:= /usr
+
+ifeq (${PREFIX},)
+PREFIX	= /usr
+endif
+
 MANDIR	:= $(PREFIX)/man
 DOCDIR  := ${PREFIX}/share/doc
 
 .PHONY			: shell-fm manual all clean tags cscope
 
-all				: shell-fm manual
+all			: shell-fm
 
 shell-fm		:
 	$(MAKE) -C source
@@ -15,10 +19,8 @@ manual			:
 	$(MAKE) -C manual
 
 install			:
-	install -m 0755 -d $(DESTDIR)$(PREFIX)/bin/
-	install -m 0755 -d $(DESTDIR)$(MANDIR)/man1/
-	install -m 0755 source/shell-fm $(DESTDIR)$(PREFIX)/bin/
-	install -m 0644 manual/shell-fm.1.gz $(DESTDIR)$(MANDIR)/man1/
+	${INSTALL_PROGRAM} source/shell-fm $(PREFIX)/bin/
+	${INSTALL_MAN} manual/shell-fm.1 $(MANDIR)/man1/
 
 install-extras		:
 	install -m 0755 -d $(DESTDIR)$(DOCDIR)/shell-fm/
