anchor.diff:                  python3-skimage \
                   python3-pylibmc \
                   python3-pil \
  -                libpq5 \
  -                webp \
  +                libwebp5 \
  +                libpng3 \
  +                libjpeg62 \
  +                libtiff5 \
                   imagemagick \
                   cython3 \
                   gdal-bin \
  
positive.code:             && python3.5 setup.py install \
              && cd /tmp && rm -rvf *
  
  
  #
  # Patch gdal data files, see
  #   https://launchpad.net/ubuntu/trusty/+source/gdal/+copyright
  RUN         curl -SL http://cdn.masonmaps.me/dist/gdal-1.11.3/data/esri_extra.wkt > /usr/share/gdal/1.11/esri_extra.wkt
  
  #
  # Install pip packages with no strict version requirement
  #
  RUN         pip3 install -q \
                  boto3 \
                  six \
                  futures \
                  flask \
                  gunicorn \
                  Click \
                  nose \
                  sphinx \
                  tox
  
  RUN         set -x \
              && python3.5 -c 'import gdal; print("GDAL Version:", gdal.VersionInfo())' \
              && python3.5 -c 'import mapnik; print("Mapnik Version:", mapnik.mapnik_version())' \
              && python3.5 -c 'import os, mapnik; print("Mapnik Plugins: ", list(mapnik.DatasourceCache.plugin_names()))' \
              && convert --version \
              && python3.5 -c 'import PIL; print("Pillow Version:", PIL.VERSION, PIL.PILLOW_VERSION)' \
              && convert rose: /tmp/rose.jpg \
              && convert rose: /tmp/rose.png \
              && convert rose: /tmp/rose.webp \
              && rm /tmp/rose*
  
  
negative.code:                 libboost-system-dev \
                  libboost-thread-dev \
                  libz-dev \
                  libwebp-dev \
                  liblcms2-dev  \
                  libjpeg-dev \
                  libpng-dev \
                  libwebp-dev \
                  libtiff-dev \
                  libproj-dev \
                  libgeos-dev \
                  libgdal-dev \
                  libicu-dev \
                  libharfbuzz-dev \
                  libfreetype6-dev \
                  libsqlite3-dev \
                  libpq-dev \
  