--- udev-rules.eclass.orig	2012-07-12 23:59:40.465838370 +0300
+++ udev-rules.eclass	2012-07-13 00:01:12.921831177 +0300
@@ -22,6 +22,8 @@
 # }
 # @CODE
 
+inherit toolchain-funcs
+
 case ${EAPI:-0} in
 	0|1|2|3|4) ;;
 	*) die "${ECLASS}.eclass API in EAPI ${EAPI} not yet established."
@@ -33,10 +35,14 @@
 # Get unprefixed udev rules directory.
 _udev_get_rulesdir() {
 	local dir
-	if has_version '<sys-fs/udev-186-r1'; then
-		dir=/lib/udev/rules.d
+	if has_version virtual/pkgconfig; then
+		dir="$($(tc-getPKG_CONFIG) --variable=udevdir udev)/rules.d"
 	else
-		dir=/usr/lib/udev/rules.d
+		if has_version '<sys-fs/udev-186-r1'; then
+			dir=/lib/udev/rules.d
+		else
+			dir=/usr/lib/udev/rules.d
+		fi
 	fi
 	echo -n $dir
 }