The in-tree version does not work with KDE Plasma 5.5 (which is stabilized at the moment). Please bump to 15.12.3.
It's already bumped in the overlay, but hasn't been moved to the tree yet because I believe it's had limited testing. What breakage did you encounter with in-tree version?
(In reply to Michael Palimaka (kensington) from comment #1) > What breakage did you encounter with in-tree version? Well I encountered some blocks while upgrading to plasma 5.5 so I assumed the plasmoid was plasma4-only, but I can't reproduce it now ... sorry for the noise.
Thanks for reporting. https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=5e10890b6ebfc31a933ac5829dfad6f723ee0aff