--- /usr/portage/net-fs/libnfs/libnfs-1.3.0.ebuild	2012-05-03 06:31:19.000000000 +0200
+++ net-fs/libnfs/libnfs-1.3.0.ebuild	2012-11-10 12:43:42.172768902 +0100
@@ -18,9 +18,9 @@
 
 LICENSE="LGPL-2.1 GPL-3"
 SLOT="0"
-IUSE="static-libs"
+IUSE="rpc static-libs"
 
-RDEPEND="net-libs/libtirpc"
+RDEPEND="rpc? ( net-libs/libtirpc )"
 DEPEND="${RDEPEND}
 	virtual/pkgconfig"
 
@@ -39,7 +39,7 @@
 
 src_configure() {
 	econf \
-		--enable-tirpc \
+		$(use_enable rpc tirpc) \
 		$(use_enable static-libs static)
 }