--- /usr/lib/portage/bin/ebuild.sh.old	2005-08-26 00:41:24.692552328 +1000
+++ /usr/lib/portage/bin/ebuild.sh.old	2005-08-26 00:41:31.067583176 +1000
@@ -367,7 +367,7 @@ 
 			tbz2)
 				bzip2 -dc "${DISTDIR}/${x}" | tar xf - ${tarvars} || die "$myfail"
 				;;
-			ZIP|zip)
+			ZIP|zip|JAR|jar)
 				unzip -qo "${DISTDIR}/${x}" || die "$myfail"
 				;;
 			gz|Z|z)