--- Makefile.orig	2014-01-09 15:01:13.000000000 +0800
+++ Makefile	2014-01-09 15:02:05.000000000 +0800
@@ -22,10 +22,11 @@ snapshot:
 	./mkrel snapshot
 
 install:
-	cp -p *.map $(SHAREDIR)/maps
-	chown $(OWNER) $(SHAREDIR)/maps/*.map
-	chgrp $(GROUP) $(SHAREDIR)/maps/*.map
-	chmod 0644 $(SHAREDIR)/maps/*.map
+	mkdir -p $(DESTDIR)$(SHAREDIR)/maps
+	cp -p *.map $(DESTDIR)$(SHAREDIR)/maps
+	chown $(OWNER) $(DESTDIR)$(SHAREDIR)/maps/*.map
+	chgrp $(GROUP) $(DESTDIR)$(SHAREDIR)/maps/*.map
+	chmod 0644 $(DESTDIR)$(SHAREDIR)/maps/*.map
 
 uninstall:
 	for i in *.map; do rm -f $(SHAREDIR)/maps/$$i || exit 1; done