fix for the completely empty DESTDIR
--- ca-certificates-20090814.orig/sbin/Makefile	2007-02-02 07:23:19.000000000 +0100
+++ ca-certificates-20090814/sbin/Makefile	2009-08-22 20:37:17.581921717 +0200
@@ -8,4 +8,5 @@ all:
 clean:
 
 install:
+	mkdir -p $(DESTDIR)/usr/sbin
 	install -m755 update-ca-certificates $(DESTDIR)/usr/sbin/