user/mate-desktop: no font deps
No MATE packages depend on any fonts, so it is possible to install MATE without having any fonts on the system, which ends up rendering horrible boxes that make no sense (horizon#353 (closed) has an example screenshot).
Either mate-desktop or mate-complete should depend on something like ttf-liberation or ttf-dejavu (+ otf-source-code-pro for nice monospace) or something. user/plasma-desktop (KDE) deps on ttf-liberation and ttf-noto, and the draft LXQt theme package (user/adelie-lxqt-theme) deps on ttf-liberation as well. The only problem is MATE seems to have a bit of trouble using the Liberation set of fonts, which I haven't poked at much yet.