--- Makefile.orig	2014-06-16 23:02:51.808174124 +0800
+++ Makefile	2014-06-16 23:03:13.422174462 +0800
@@ -48,9 +48,9 @@ depend:
 	gcc -E -MM *.c > .depend
 
 install: xglurbules xglurbules-noshm ${MAN_FILE}
-	${INSTALL} xglurbules ${BIN_DIR}
-	${INSTALL} xglurbules-noshm ${BIN_DIR}
-	${INSTALL} ${MAN_FILE} ${MAN_DIR}
+	${INSTALL} xglurbules $(DESTDIR)${BIN_DIR}
+	${INSTALL} xglurbules-noshm $(DESTDIR)${BIN_DIR}
+	${INSTALL} ${MAN_FILE} $(DESTDIR)${MAN_DIR}
 
 xglurbules.1.gz: xglurbules.1
 	${COMPRESS} xglurbules.1 -c > xglurbules.1.gz