anchor.diff:  
   # Add any extra requirements. Done at end to avoid cache busting.
   ADD requirements.txt requirements.txt
  -RUN pip install -r requirements.txt
  -RUN pip3 install -r requirements.txt
  +RUN mkdir /home/$NB_USER/work/ucsl17_notebooks
  +RUN git clone https://github.com/Mohitsharma44/ucsl17 /home/$NB_USER/work/ucsl17_notebooks
   
   USER $NB_USER
  
positive.code:     conda clean -tipsy
  
  # Install JupyterHub to get the jupyterhub-singleuser startup script
  RUN pip --no-cache-dir install 'jupyterhub==0.5'
  
  # Install Python 3 packages
  # Remove pyqt and qt pulled in for matplotlib since we're only ever going to
  # use notebook-friendly backends in these images
  RUN conda install --quiet --yes \
  #    'pandas=0.18*' \
  #    'numexpr=2.5*' \
  #    'matplotlib=1.5*' \
  #    'scipy=0.17*' \
  #    'seaborn=0.7*' \
  #    'scikit-learn=0.17*' \
  #    'scikit-image=0.11*' \
  #    'sympy=1.0*' \
  #    'patsy=0.4*' \
  #    'statsmodels=0.6*' \
  #    'cloudpickle=0.1*' \
  #    'dill=0.2*' \
  #    'numba=0.23*' \
  #    'bokeh=0.11*' \
  #    'h5py=2.5*' && \
      'cython' \
      'numpy' \
      'pillow' \
  
negative.code: # Remove pyqt and qt pulled in for matplotlib since we're only ever going to
  # use notebook-friendly backends in these images
  RUN conda create --quiet --yes -p $CONDA_DIR/envs/python2 python=2.7 \
      'cython' \
      'numpy' \
      'pillow' \
  