anchor.diff:          freecad \
           # pspp dependencies
           pspp \
  +        # unoconv dependencies
  +        libreoffice \
           # gosu dependencies
           curl \
           gnupg2 \
  
positive.code: FROM python:3.5-slim-stretch
  
  # ensure unoconv can locate the uno library
  ENV PYTHONPATH=/usr/lib/python3/dist-packages
  
  RUN usermod -d /home www-data \
      && chown www-data:www-data /home \
      && apt-get update \
      # mfr dependencies
      && apt-get install -y \
  
negative.code:     && rm -rf /var/lib/apt/lists/* \
      && pip install -U pip \
      && pip install setuptools==37.0.0 \
      && mkdir -p /code \
      && pip install unoconv==0.8.2
  
  WORKDIR /code
  
  