#!/bin/sh
find /usr/portage -type f -name '*[0-9][0-9]*-gentoo.el' |
sed -e 's-/usr/portage/--;s-/files/.*--' |
sort | uniq |
while read p; do
    f=$(ls /usr/portage/$p/files/*[0-9][0-9]*-gentoo.el | tail -1)
    grep -q 'load-path.*cons' $f && echo $p
done