2018-10-01 18:12:18,991 [INFO] {11201} koji.build.buildroot:440 Running mock as kojibuilder INFO: mock.py version 1.4.9 starting (python version = 3.6.4)... Start: init plugins INFO: selinux disabled Finish: init plugins Start: run Start: clean chroot Finish: clean chroot Start: chroot init INFO: calling preinit hooks INFO: enabled HW Info plugin Mock Version: 1.4.9 INFO: Mock Version: 1.4.9 Start: dnf install ERROR: Command failed: # /usr/bin/dnf --installroot /var/lib/mock/f29-build-30503-16549/root/ --setopt=install_weak_deps=0 groupinstall build Unable to detect release version (use '--releasever' to specify release version) Failed to synchronize cache for repo 'build', disabling. Warning: Module or Group 'build' does not exist. Error: Nothing to do.