anchor.diff:              texlive-xetex \
               texlive-fonts-recommended \
               texlive-generic-recommended
  +
  +ENV PATH ${APP_DIR}/venv/bin:$PATH
   
   # Set this to be on container storage, rather than under $HOME
   ENV IPYTHONDIR ${APP_DIR}/venv/etc/ipython
  
positive.code: 
  RUN pip install --no-cache-dir jupyterhub==0.9.2
  
  # hmms needs to be installed after cython, for ce88 and ls88-3
  RUN pip install --no-cache-dir hmms==0.1
  
  # Install nbserverproxy
  RUN jupyter serverextension enable  --sys-prefix --py nbserverproxy
  
  # Install nbzip
  RUN jupyter serverextension enable  --sys-prefix --py nbzip && \
      jupyter nbextension     install --sys-prefix --py nbzip && \
  
negative.code: 
  RUN apt-get update --yes
  RUN apt-get install --yes \
              libdpkg-perl
              python3.6 \
              python3.6-venv \
              python3.6-dev \
  