2020-01-08 14:04:55,999 [INFO] {86000} koji.build.buildroot:518 Running mock as kojibuilder
INFO: mock.py version 1.4.21 starting (python version = 3.6.8)...
Start: init plugins
INFO: selinux enabled
Finish: init plugins
INFO: Signal handler active
Start: run
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: calling preinit hooks
INFO: enabled HW Info plugin
Mock Version: 1.4.21
INFO: Mock Version: 1.4.21
Start: yum install
ERROR: Command failed: 
 # /usr/bin/yum --installroot /var/lib/mock/v8.1-base-1680-1177/root/ groupinstall srpm-build --setopt=tsflags=nocontexts
Failed to set locale, defaulting to C
There is no installed groups file.
Maybe run: yum groups mark convert (see man yum)
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest
Error: Package: elfutils-default-yama-scope-0.170-4.el7.noarch (build)
           Requires: systemd