As explained at:
https://bugs.gentoo.org/show_bug.cgi?id=284822

There are multiple issues with sys-apps/man that could be solved
switching to sys-apps/man-db instead, the problem is that the process
looks to be blocked by:
https://bugs.gentoo.org/show_bug.cgi?id=289884

After checking that bug report, looks like a patch already exists to fix
that one:
https://bugs.gentoo.org/show_bug.cgi?id=289884#c19

But moving is still stalled, what else is pending?

Thanks a lot