anchor.diff:  
   RUN chown -R $NB_USER:users $NDIR
   
  -USER jovyan
  +USER $NB_USER
   RUN find . -name '*.ipynb' -exec jupyter trust {} \;
  
positive.code: RUN cd $NDIR/nrn/src/nrnpython; python setup.py install
  RUN chmod o+w $NDIR
  
  USER jovyan
  
  ### Install PyRhO
  ENV VPYRHO 0.9.4
  
negative.code: ENV LANG en_GB.UTF-8
  ENV LANGUAGE en_GB.UTF-8
  
  USER $NB_USER
  
  RUN conda config --add channels brian-team
  # TODO: Update ipywidgets to 5.1*
  