anchor.diff:  RUN bash /tmp/bio1b-packages.bash 
   
   # install ib134L packages
  +
   COPY ib134-packages.bash /tmp/ib134-packages.bash
   RUN bash /tmp/ib134-packages.bash
  
positive.code: RUN apt-get update -qq --yes > /dev/null && \
      apt-get install --yes -qq \
          libpython2.7 > /dev/null
  
  # Install these without 'recommended' packages to keep image smaller.
  # Useful utils that folks sort of take for granted
  
negative.code:         libnss3 \
          libxss1 \
          > /dev/null
  
  
  WORKDIR /home/jovyan
  
  