anchor.diff:  ENV GOROOT=/usr/local/go
   ENV GOPATH=/go
   ENV GOCACHE=/gocache
  -ENV GOBIN=/gobin
  -ENV PATH=/usr/local/go/bin:/gobin:/usr/local/google-cloud-sdk/bin:$PATH
  +ENV GOBIN=/goinstall
  +ENV PATH=/usr/local/go/bin:/goinstall:/usr/local/google-cloud-sdk/bin:$PATH
   
   # LLVM support
   ENV LLVM_DIRECTORY=/usr/lib/llvm
  
positive.code: # mountpoints in /config are special.
  RUN mkdir -p /go && \
      mkdir -p /gocache && \
      mkdir -p /gobin && \
      mkdir -p /config/.docker && \
      mkdir -p /config/.config/gcloud && \
      mkdir -p /config/.kube && \
  
negative.code: # mountpoints in /config are special.
  RUN mkdir -p /go && \
      mkdir -p /gocache && \
      mkdir -p /goinstall && \
      mkdir -p /config/.docker && \
      mkdir -p /config/.config/gcloud && \
      mkdir -p /config/.kube && \
  