anchor.diff:  RUN ln -s /usr/bin/python3 /usr/bin/python
   
   COPY --from=envoy /usr/local/bin/envoy /usr/local/bin/envoy
  -COPY --from=builder /usr/lib/python3.6/site-packages /usr/lib/python3.6/site-packages
  +COPY --from=builder /usr/lib/python3.7/site-packages /usr/lib/python3.7/site-packages
   
   COPY --from=artifacts /buildroot/bin/ambex /usr/bin/ambex
   COPY --from=artifacts /buildroot/bin/watt /usr/bin/watt
  
positive.code: ARG artifacts="builder"
  
  # This controls where we copy envoy from.
  ARG envoy="quay.io/datawire/ambassador:0.80.0"
  
  ########################################
  # The builder image
  
negative.code: 
  # This argument controlls the base image is used for both our build
  # container and for the release containers.
  ARG base="frolvlad/alpine-glibc:alpine-3.10"
  
  # This argument controls where the release images get their artifacts
  # from. We override it for incremental builds, but default it to the
  