--- /usr/portage/eclass/unpacker.eclass	2012-02-13 14:01:13.000000000 -0700
+++ unpacker.eclass	2012-03-22 19:42:20.000000000 -0600
@@ -311,7 +311,8 @@
 	[[ ${arch} != unpack_* ]] && unpack_banner "${a}"
 
 	if [[ -z ${arch} ]] ; then
-		${comp} "${a}" > "${a%.*}"
+		local b="${a%.*}"
+		${comp} "${a}" > "${b##*/}"
 	elif [[ -z ${comp} ]] ; then
 		${arch} "${a}"
 	else