anchor.diff:      && /usr/bin/common_cleanup.sh
   
   FROM build_base as build_galaxy
  +
  +ARG GALAXY_RELEASE=release_20.05
  +ARG GALAXY_REPO=https://github.com/galaxyproject/galaxy
  +
   COPY ./files/common_cleanup.sh /usr/bin/common_cleanup.sh
   # Install Galaxy
   RUN apt update && apt install --no-install-recommends libcurl4-openssl-dev libssl-dev python3-dev python3-pip -y \
  
positive.code: # --- Final image ---
  FROM $DOCKER_REGISTRY/$DOCKER_REGISTRY_USERNAME/galaxy-cluster-base:$IMAGE_TAG as final
  
  COPY ./files/common_cleanup.sh /usr/bin/common_cleanup.sh
  COPY ./files/create_galaxy_user.py /usr/local/bin/create_galaxy_user.py
  
  
negative.code: ARG IMAGE_TAG=latest
  
  FROM buildpack-deps:18.04 as build_base
  
  ENV EXPORT_DIR=/export \
      GALAXY_ROOT=/galaxy \
  