--- /usr/portage/net-dns/bind-tools/bind-tools-9.8.1.ebuild	2012-05-17 18:01:21.000000000 +0200
+++ bind-tools-9.8.1.ebuild	2012-05-22 20:05:42.000000000 +0200
@@ -55,7 +55,7 @@
 	econf \
 		--localstatedir=/var \
 		$(use_enable ipv6) \
-		$(use_with idn) \
+		$(use_with idn idn=${ROOT}usr) \
 		$(use_with ssl openssl) \
 		$(use_with xml libxml2) \
 		$(use_with gssapi) \