anchor.diff: -FROM debian:buster
  +FROM ubuntu:20.04
   
   ENV DEBIAN_FRONTEND=noninteractive
   
  
positive.code: # trigger big preinstalls
  COPY ./lazybin/go $LAZYBIN
  RUN go version
  COPY ./lazybin/vim $LAZYBIN
  RUN vim --version
  COPY ./lazybin/docker $LAZYBIN
  RUN docker --version
  COPY ./lazybin/gotestsum $LAZYBIN
  
negative.code: # for homebrew to disable analytics
  ENV HOMEBREW_NO_ANALYTICS=1
  # for vim
  # ENV VIM=$LOCAL/share/vim
  # for go
  ENV PATH="$PATH:$LOCAL_BIN/go/latest/bin"
  ENV GOBIN=$LOCAL_BIN
  