anchor.diff:  WORKDIR /tmp
   
   # Install system packages
  -RUN add-apt-repository ppa:webupd8team/atom && \
  -    apt-add-repository ppa:octave/stable && \
  +RUN apt-add-repository ppa:octave/stable && \
       apt-get update && \
       apt-get install -y --no-install-recommends \
           build-essential \
  
positive.code:         liblapack-dev \
          libmpich-dev \
          libopenblas-dev \
          mpich \
          \
          meld \
          atom \
          clang-format && \
      apt-get install -y --no-install-recommends \
          octave \
          gnuplot-x11 \
  
negative.code:          pandas \
           nose \
           sphinx \
           flufl.lock \
           ply \
           pytest \
           six \
           urllib3 \
           ipython \
           jupyter \
  