anchor.diff: -FROM nikolaik/python-nodejs:python3.8-nodejs10
  +FROM python:3.8
   
   ENV DEBIAN_FRONTEND=noninteractive
   ENV LANG=en_US.UTF-8
  
positive.code:         libproj-dev \
          locales \
          postgresql-client \
          python3-virtualenv \
          rsync \
          runit-init \
          vim \
          wait-for-it && \
      apt-get clean && \
          rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
negative.code: # Install `pip` packages. #
  ###########################
  
  RUN python3 -m venv "$VIRTUAL_ENV"
  ENV PATH="$VIRTUAL_ENV/bin:$PATH"
  RUN pip install  --quiet --upgrade pip && \
      pip install  --quiet pip-tools
  