emerge games-action/minetest and emerge games-action/minetest_game fail, because of the following problem: make[2]: *** No rule to make target '/usr/lib64/libIrrlicht.so', needed by '/var/tmp/portage/games-action/minetest-0.4.10-r1/work/minetest-0.4.10/bin/minetest'. Stop. Reproducible: Always
that's because irrlicht-1.8.1 had a broken install. emerge 1.8.1-r1 and try again.