v4.0 of LXC was released on 25 Mar 2020. this is important release, because of cgroupfs2 support. It is not available/usable in the current gentoo ebuild. see also https://bugs.gentoo.org/701372 - app-emulation/lxc: version bump to 3.2.1 https://bugs.gentoo.org/712802 - sys-fs/lxcfs-4.0.0: version bump Reproducible: Always
*** This bug has been marked as a duplicate of bug 701372 ***