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