anchor.diff:  COPY --from=centos7-build /tmp/google-cloud-ops-agent.tgz /google-cloud-ops-agent-centos-7.tgz
   COPY --from=centos7-build /google-cloud-ops-agent*.rpm /
   
  -FROM scratch AS rockylinux8
  -COPY --from=rockylinux8-build /tmp/google-cloud-ops-agent.tgz /google-cloud-ops-agent-rockylinux-8.tgz
  -COPY --from=rockylinux8-build /google-cloud-ops-agent*.rpm /
  +FROM scratch AS centos8
  +COPY --from=centos8-build /tmp/google-cloud-ops-agent.tgz /google-cloud-ops-agent-centos-8.tgz
  +COPY --from=centos8-build /google-cloud-ops-agent*.rpm /
   
   FROM scratch AS sles12
   COPY --from=sles12-build /tmp/google-cloud-ops-agent.tgz /google-cloud-ops-agent-sles-12.tgz
  
positive.code: COPY --from=focal /* /
  COPY --from=bionic /* /
  COPY --from=centos7 /* /
  COPY --from=rockylinux8 /* /
  COPY --from=sles12 /* /
  COPY --from=sles15 /* /
  
negative.code: WORKDIR /work
  RUN ./pkg/rpm/build.sh
  
  FROM rockylinux:8 AS centos8-build
  
  RUN set -x; yum -y update && \
      dnf -y install 'dnf-command(config-manager)' && \
  