This may have been resolved in the latest, yet undeployed version.
toolsbeta.test@toolsbeta-sgebastion-05:~$ toolforge build cancel --help Usage: toolforge build cancel [OPTIONS] [BUILD_NAME]... Cancel a running build (does nothing for stopped ones) Options: -v, --verbose Show extra verbose output --all Cancel all the current builds. -y, --yes-i-know Don't ask for confirmation. --kubeconfig PATH Path to the kubeconfig file. [default: ~/.kube/config] -v, --verbose Show extra verbose output --help Show this message and exit.