--- nut-2.4.1-r1.ebuild	2010-01-09 21:07:22.000000000 +0100
+++ nut-2.4.1-r1.ebuild	2010-03-20 21:55:45.187767719 +0100
@@ -131,9 +131,11 @@
 	newinitd "${FILESDIR}"/nut-2.2.2-init.d-upsdrv upsdrv
 	newinitd "${FILESDIR}"/nut-2.2.2-init.d-upsmon upsmon
 
-	# This sets up permissions for nut to access a UPS
-	insinto /etc/udev/rules.d/
-	newins scripts/udev/nut-usbups.rules 70-nut-usbups.rules
+	if use usb; then
+		# This sets up permissions for nut to access a UPS
+		insinto /etc/udev/rules.d/
+		newins scripts/udev/nut-usbups.rules 70-nut-usbups.rules
+	fi
 
 	keepdir /var/lib/nut