anchor.diff:      libxslt-dev \
       git \
       make \
  -    python2.7 \
  -    python2.7-dev \
  -    python-pip \
       pkg-config \
       gcc \
       zlib1g-dev \
       wget \
       tzdata \
  - && rm -rf /var/lib/apt/lists/*
  +    && rm -rf /var/lib/apt/lists/*
   
   COPY . /src/
   WORKDIR /src/
  
positive.code: FROM ubuntu:16.04
  
  RUN addgroup --system archive \
      && adduser --system --group archive
  
negative.code: RUN wget -O archive-requirements.txt $ARCHIVE_REQUIREMENTS
  
  USER archive
  # See also https://github.com/pypa/pip/issues/5221
  RUN wget -O get-pip.py https://bootstrap.pypa.io/get-pip.py \
      && python get-pip.py --user \
      && rm get-pip.py
  RUN python -m pip install --no-cache-dir --user -r archive-requirements.txt
  RUN python -m pip install --no-cache-dir --user -e .
  
  ENV PATH $PATH:/home/archive/.local/bin
  
  