renaming the ebuild works, see layman -a xmw
https://cgit.gentoo.org/dev/xmw.git/commit/?id=752bcf7763801281638ba1b83604424047da407d https://cgit.gentoo.org/dev/xmw.git/commit/?id=175879e410e5c7ef67b531ddae2a76eecb6fafdc
Obsolete now that sogo is in portage (#564562) :) (unless you want to add the older version?)