anchor.diff:    && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
   
  -# Install the JupyterLab extension for ipyleaflet (currently not available on npm)
  -RUN git clone https://github.com/ellisonbg/ipyleaflet.git
  -RUN jupyter labextension install ipyleaflet/jslab
  +# Install the JupyterLab extension for ipyleaflet (currently not available on npm).
  +RUN git clone https://github.com/tylere/ipyleaflet.git \
  +  && jupyter labextension install ipyleaflet/jslab \
  +  && rm -fr ipyleaflet
   
   # Install the Earth Engine Python API.
   # This is installed as the last step because the package is updated often.
  
positive.code: FROM jupyter/scipy-notebook
  
  MAINTAINER Tyler Erickson <tylere@google.com>
  
  USER root
  
  # Install dependencies.
  RUN apt-get update \
    # Install ipywidgets. 
    && apt-get install -y --no-install-recommends \
               # For cairo/ipywidgets: 
               libjpeg-dev \
               libgif-dev \
               libcairo2-dev \
  
negative.code:   && pip install ipywidgets \
    && jupyter nbextension enable --py widgetsnbextension --sys-prefix \
    && jupyter labextension install @jupyter-widgets/jupyterlab-manager \
    && pip install ipyleaflet \
    && jupyter nbextension enable --py --sys-prefix ipyleaflet \
    && apt-get install -y --no-install-recommends \
               build-essential \
               libssl-dev \
               libffi-dev \
    && pip install cryptography \
    && apt-get purge -y build-essential \
               libssl-dev \
               libffi-dev \
  