--- expat-2.0.1-r5.ebuild.orig	2011-09-20 04:01:08.000000000 +0900
+++ expat-2.0.1-r5.ebuild	2011-09-21 00:50:25.000000000 +0900
@@ -13,6 +13,7 @@
 SLOT="0"
 KEYWORDS="~alpha amd64 ~arm ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc x86 ~sparc-fbsd ~x86-fbsd"
 IUSE="elibc_FreeBSD examples static-libs"
+DEPEND="elibc_FreeBSD? ( sys-freebsd/freebsd-mk-defs )"
 
 src_prepare() {
 	epatch \