gistfile1.txt

#18 [stage-1 10/14] RUN echo "Defaults env_keep += "DEBIAN_FRONTEND"" >>/etc/sudoers
#18 DONE 0.1s

#19 [stage-1 11/14] RUN addgroup --system kvm
#19 0.504 Adding group `kvm' (GID 101) ...
#19 0.576 Done.
#19 DONE 0.6s

#20 [stage-1 12/14] RUN usermod -a -G kvm runner
#0 0.102 usermod: group 'kvm' does not exist
#20 ERROR: process "/bin/sh -c usermod -a -G kvm runner" did not complete successfully: exit code: 6
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 > [stage-1 12/14] RUN usermod -a -G kvm runner:
#0 0.102 usermod: group 'kvm' does not exist
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s390x.Dockerfile:52
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  50 |     # Make sure kvm group exists. This is a no-op when it does.
  51 |     RUN addgroup --system kvm
  52 | >>> RUN usermod -a -G kvm runner
  53 |     USER runner
  54 |     ENV USER=runner
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ERROR: failed to solve: process "/bin/sh -c usermod -a -G kvm runner" did not complete successfully: exit code: 6