Please stabilize =net-analyzer/nagios-check_ipmi_sensor-2.3.
Can't go stable because of bug https://bugs.gentoo.org/show_bug.cgi?id=364485 amd64 will drop its keywords soon as well We haven't managed to find any tester for freeipmi
Feel free to mark stable for amd64 if you run a stable chroot and the package works for you.
Done!