anchor.diff:          build-essential \
           libopenmpi-dev \
       && rm -rf /var/lib/apt/lists/* \
  -    && apt-get clean
  +    && apt-get autoclean
   
   RUN cd /work/nrn-7.4/src/nrnpython \
       && python setup.py install
  
positive.code:         build-essential \
          libncurses-dev \
          python \
          libpython-dev \
          cython \
          openmpi-bin \
  
negative.code: FROM ubuntu:16.04
  
  MAINTAINER Daisuke Miyamoto <miyamoto@brain.imi.i.u-tokyo.ac.jp>
  
  ARG NRN_VERSION="7.4"
  ARG NRN_ARCH="x86_64"
  