Created attachment 460946 [details] build.log Emerging with >=app-text/dvipsk-5.996_p20160523 solves the issue.
Package 'dev-texlive/texlive-basic-2016' NOT merged due to file collisions.
commit 6a13c7e3558bbca3067c81c8ff64c7b39ec68911 Author: Alexis Ballier <aballier@gentoo.org> Date: Sun Jan 22 15:18:17 2017 +0100 dev-texlive/texlive-basic: block older dvipsk, bug #606786 thanks!