Unprivileged container used to run, after update error: wait_on_daemonized_start: 837 Received container state "ABORTING" instead of "RUNNING"

After a git clone form the repo on github I followed the build instructions on GitHub - lxc/lxc: LXC - Linux Containers. The build finished successfully but lxc-start now errors out with

lxc-start: centos7: ../src/lxc/parse.c: lxc_file_for_each_line_mmap: 129 Failed to parse config file "/usr/share/lxc/config/common.conf" at line "lxc.seccomp.profile = /usr/share/lxc/c
onfig/common.seccomp"
lxc-start: centos7: ../src/lxc/parse.c: lxc_file_for_each_line_mmap: 129 Failed to parse config file "/home/k.nick/.local/share/lxc/centos7/config" at line "lxc.include = /usr/share/lx
c/config/common.conf"
Failed to load config for centos7
lxc-start: centos7: ../src/lxc/tools/lxc_start.c: lxc_start_main: 241 Failed to create lxc_containertype or paste code here

I found a hint about seccomp needing to be enabled explicitly https://discuss.linuxcontainers.org/t/seccomp-configuration-not-loaded-by-lxc/5102/2 but I am struggling to accomplish that as I am unfamiliar with meson. (configure, make… seems to be a thing of the past, right?)