2022-05-12 10:31:08,892 [INFO] {805937} koji.build.buildroot:541 Running mock as kojibuilder
ERROR: Option --old-chroot has been deprecated. Use --isolation=simple instead.
INFO: mock.py version 2.12 starting (python version = 3.6.8, NVR = mock-2.12-1.el8)...
Start(bootstrap): init plugins
INFO: selinux enabled
Finish(bootstrap): init plugins
Start: init plugins
INFO: selinux enabled
Finish: init plugins
INFO: Signal handler active
Start: run
Start: clean chroot
Finish: clean chroot
Start(bootstrap): chroot init
INFO: calling preinit hooks
INFO: enabled HW Info plugin
Mock Version: 2.12
INFO: Mock Version: 2.12
Start(bootstrap): dnf install
ERROR: Command failed: 
 # /usr/bin/dnf --installroot /var/lib/mock/module-rust-toolset-rhel8-8060020220512022837-eab6f2ea-build-54567-16585-bootstrap/root/ --setopt=deltarpm=False --allowerasing --disableplugin=local --disableplugin=spacewalk --disableplugin=versionlock install dnf dnf-plugins-core --setopt=tsflags=nocontexts
Unable to detect release version (use '--releasever' to specify release version)
No matches found for the following disable plugin patterns: local, versionlock
No match for argument: dnf
No match for argument: dnf-plugins-core
Error: Unable to find a match: dnf dnf-plugins-core