anchor.diff:      libtool libffi-dev make automake \
       libssl-dev libreadline-dev zlib1g-dev \
       git libzmq-dev autoconf pkg-config && \
  -#    build-essential git libssl-dev libreadline-dev libffi-dev pkg-config libzmq-dev gnuplot-nox libgsl0-dev libtool autoconf automake zlib1g-dev libsqlite3-dev libmagick++-dev imagemagick libatlas-base-dev && \
       apt-get clean && \
       rm -rf /var/lib/apt/lists/*
   
  
positive.code: # Octave Kernel
  # From arnau/docker-octave-notebook
  USER root
  RUN apt-get update \
   && apt-get install -y octave liboctave-dev \
   && apt-get autoclean \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  USER $NB_USER
  
  #jupyter nbextension enable --py --sys-prefix widgetsnbextension
  RUN pip install octave_kernel \
   && python -m octave_kernel.install \
   && conda install -y ipywidgets
  
  
  ### Install Sage
  
negative.code: RUN ruby-build $RUBY_VERSION $RUBY_DIR
  
  RUN gem install bundler cztop iruby pry pry-doc awesome_print gnuplot rubyvis nyaplot --no-document && \
      iruby register --force
  
  # brendan-rius/jupyter-c-kernel
  