anchor.diff:  
   # Run a simple interactive instance of the tests container
   LABEL RUN /usr/bin/docker run -ti --rm --volume=/var/lib/cockpit-secrets/tasks:/secrets:ro --volume=/var/cache/cockpit-tasks/images:/cache/images:rw IMAGE /bin/bash -i
  +
  +# Start a container in the background; attach to it with "docker exec -it <name> byobu"
  +LABEL DEV /usr/bin/docker run -d --volume=/var/cache/cockpit-tasks/images:/cache/images:rw IMAGE sleep infinity
  
positive.code:     ln -snf /run/secrets/webhook/.config--github-token /home/user/.config/github-token && \
      chmod g=u /etc/passwd && \
      chmod -R ugo+w /cache /secrets /cache /home/user && \
      ln -s /app/bin/firefox /usr/bin/firefox
  
  # Prevent us from screwing around with KVM settings in the container
  RUN touch /etc/modprobe.d/kvm-amd.conf && touch /etc/modprobe.d/kvm-intel.conf
  
negative.code:         rpmdevtools \
          rsync \
          sassc \
          socat \
          strace \
          tar \
          vim-enhanced \
          virt-install \
          wget && \
      curl -s -o /tmp/cockpit.spec https://raw.githubusercontent.com/cockpit-project/cockpit/master/tools/cockpit.spec && \
  