--- cinnamon-1.2-r1.ebuild_old	2012-01-27 22:54:26.000000000 +0100
+++ cinnamon-1.2-r1.ebuild	2012-01-30 11:22:23.000000000 +0100
@@ -142,7 +142,10 @@
 		   files/usr/bin/cinnamon-settings \
 		   files/cinnamon-settings.pot \
 		   files/makepot || die "sed 2 failed"
-	mv files/usr/lib files/usr/$(get_libdir) || die "mv failed"
+	# this fails whenever $(get_libdir) is already "lib":
+	if [[ "$(get_libdir)" != "lib" ]]; then
+		mv files/usr/lib files/usr/$(get_libdir) || die "mv failed"
+	fi
 
 	eautoreconf
 	gnome2_src_prepare