anchor.diff:  ENV PATH="$VIRTUAL_ENV/bin:$PATH"
   COPY ./dependencies/pip/prod.txt "${TMP_DIR}/pip_dependencies.txt"
   COPY --from=build-python "$VIRTUAL_ENV" "$VIRTUAL_ENV"
  +COPY . "${KOBOCAT_SRC_DIR}"
   
   # Using `/etc/profile.d/` as a repository for non-hard-coded environment variable overrides.
   RUN echo "export PATH=${PATH}" >> /etc/profile && \
  
positive.code: ENV VIRTUAL_ENV=/opt/venv \
      KOBOCAT_SRC_DIR=/srv/src/kobocat \
      TMP_DIR=/srv/tmp
  
  # Copy KoBoCAT directory
  COPY . "${KOBOCAT_SRC_DIR}"
  
  # Install `pip` packages
  RUN python3 -m venv "$VIRTUAL_ENV"
  
negative.code: RUN pip install  --quiet --upgrade pip && \
      pip install  --quiet pip-tools
  COPY ./dependencies/pip/prod.txt "${TMP_DIR}/pip_dependencies.txt"
  RUN pip-sync "${TMP_DIR}/pip_dependencies.txt" 1>/dev/null
  
  FROM python:3.8-slim
  
  