$NetBSD: patch-ac,v 1.3 2012/11/28 15:50:03 ryoon Exp $

--- Makefile.orig	2012-06-09 20:09:44.000000000 +0000
+++ Makefile
@@ -124,7 +124,7 @@ install-progs: install-progs-yes $(PROGS
 
 install-data: $(DATA_FILES)
 	$(Q)mkdir -p "$(DATADIR)"
-	$(INSTALL) -m 644 $(DATA_FILES) "$(DATADIR)"
+	$(INSTALL) -c -m 644 $(DATA_FILES) "$(DATADIR)"
 
 uninstall: uninstall-libs uninstall-headers uninstall-progs uninstall-data