anchor.diff:      pip install --no-cache-dir -e $MAGPIE_DIR && \
       apk --purge del .build-deps
   
  +COPY ./ $MAGPIE_DIR
  +
   # equivalent of `make install` without conda env and pre-installed packages
   RUN pip install --no-dependencies -e $MAGPIE_DIR
   # equivalent of `make cron start` without conda env
  
positive.code: ARG MAGPIE_DIR=/opt/local/src/magpie
  ENV MAGPIE_ENV_DIR=$MAGPIE_DIR/env
  WORKDIR $MAGPIE_DIR
  COPY ./ $MAGPIE_DIR
  
  # magpie cron service
  ADD magpie-cron /etc/cron.d/magpie-cron
  
negative.code: RUN touch ~/magpie_cron_status.log
  # set /etc/environment so that cron runs using the environment variables set by docker
  RUN env >> /etc/environment
  
  COPY magpie/__init__.py magpie/__meta__.py ./magpie/
  COPY requirements* setup.py README.rst HISTORY.rst ./
  
  RUN apk update && apk add \
          bash \
  