sys-apps/systemd
# force safer graphite, etc (no time to test others)
=sys-devel/gcc-5.0*
=sys-devel/gcc-5.1*
=sys-devel/gcc-5.2*
=sys-devel/gcc-6.0*
=sys-devel/gcc-6.1*
=sys-devel/gcc-6.2*
<dev-libs/isl-0.18

# intel legacy
=sys-firmware/intel-microcode-20180108*
=sys-firmware/intel-microcode-20171117_p20171215*