anchor.diff:  # Increase the value below to force renstalling of all dependencies
   ENV DEPENDENCIES_EPOCH_NUMBER=${DEPENDENCIES_EPOCH_NUMBER}
   
  -# Install curl and gnupg2 - needed to download nodejs in next step
  +# Install curl and gnupg2 - needed to download nodejs in the next step
   RUN apt-get update \
       && apt-get install -y --no-install-recommends \
              curl gnupg2 \
  
positive.code: 
  RUN pip install --upgrade pip==${PIP_VERSION}
  
  # Airflow sources change frequently but dependency onfiguration won't change that often
  # We copy setup.py and other files needed to perform setup of dependencies
  # This way cache here will only be invalidated if any of the
  # version/setup configuration change but not when airflow sources change
  
negative.code: ENV CASS_DRIVER_BUILD_CONCURRENCY=${CASS_DRIVER_BUILD_CONCURRENCY}
  ENV CASS_DRIVER_NO_CYTHON=${CASS_DRIVER_NO_CYTHON}
  
  # By default PIP install run without cache to make image smaller
  ARG PIP_NO_CACHE_DIR="true"
  ENV PIP_NO_CACHE_DIR=${PIP_NO_CACHE_DIR}
  RUN echo "Pip no cache dir: ${PIP_NO_CACHE_DIR}"
  