anchor.diff:      # Use a fixed apt-get repo to stop intermittent failures due to flaky httpredir connections,
       # as described by Lionel Chan at http://stackoverflow.com/a/37426929/5881346
   RUN sed -i "s/httpredir.debian.org/debian.uchicago.edu/" /etc/apt/sources.list && \
  -    apt-get update && apt-get install -y build-essential unzip cmake && \
  +    apt-get update && \
  +    # Needed by vowpalwabbit & lightGBM (GPU build).
  +    # https://github.com/VowpalWabbit/vowpal_wabbit/wiki/Python#installing
  +    # https://lightgbm.readthedocs.io/en/latest/GPU-Tutorial.html#build-lightgbm
  +    apt-get install -y build-essential unzip cmake && \
  +    apt-get install -y libboost-dev libboost-program-options-dev libboost-system-dev libboost-thread-dev libboost-math-dev libboost-test-dev libboost-python-dev libboost-filesystem-dev zlib1g-dev && \
       pip install --upgrade pip && \
       # enum34 is a backport of the Python 3.4 enum class to Python < 3.4.
       # No need since we are using Python 3.7. This is causing errors for packages
  
positive.code:     # b/149905611 The geopandas tests are broken with the version 0.7.0
      pip install geopandas==0.6.3 && \
      pip install nnabla && \
      /tmp/clean-layer.sh
  
  # Tesseract and some associated utility packages
  
negative.code:     pip install pyocr && \
      /tmp/clean-layer.sh
  ENV TESSERACT_PATH=/usr/bin/tesseract
  
  # For Facets
  ENV PYTHONPATH=$PYTHONPATH:/opt/facets/facets_overview/python/
  