anchor.diff:  
  +# Build base-jupyter first
   FROM base-jupyter
  +
   
   USER root
   
  +
  +# Install additional dependencies
   RUN apt-get update && \
       apt-get install -y --no-install-recommends \
       fonts-dejavu \
  
positive.code:     'r-crayon=1.3*' \
      'r-randomforest=4.6*' && conda clean -tipsy
  
  RUN cd /opt && \
      wget https://cran.r-project.org/src/contrib/ISLR_1.0.tar.gz && \
      tar zxvf ISLR_1.0.tar.gz && \
  
negative.code:     gcc && apt-get clean && \
      rm -rf /var/lib/apt/lists/*
  
  
  # Install conda dependencies for R kernel
  RUN conda config --add channels r && \
      conda install --quiet --yes \
      'r-base=3.3.1 1' \
  