anchor.diff:  
   # XXX: Idem for user env?
   ENV \
  -  TREEBOX_IMAGE="$IMAGE_NAME:$DOCKER_TAG" \
  +  TREEBOX_IMAGE="$IMAGE_NAME" \
     TREEBOX_SRC="$SRC_BRANCH:$GIT_COMMIT" \
     LANG=en_US.UTF-8
   
  -LABEL \
  -    org.label-schema.name="$IMAGE_NAME:$DOCKER_TAG" \
  -    org.label-schema.build-date="$BUILD_DATE" \
  -    org.label-schema.version="$VERSION" \
  -    org.label-schema.vcs-ref=$GIT_COMMIT \
  -    org.label-schema.vcs-url="https://github.com/bvberkum/x-docker" \
  -    org.label-schema.schema-version="1.0"
  -
   
   # Id: x-docker/0.0.2-dev
  
positive.code: MAINTAINER B. van Berkum <dev@dotmpe.com>
  
  LABEL \
    description="Lots of dev tooling and a user setup" \
    urls.hub=https://hub.docker.com/r/bvberkum/treebox \
    urls.repo=https://github.com/bvberkum/x-docker
  
  
  # Setup package manager
  
negative.code: # Fancy up (root) env
  ENV TREEBOX_USER=$username \
    TREEBOX_BUILD_ID=$BUILD_CODE \
    TREEBOX_IMAGE="$IMAGE_NAME" \
    TREEBOX_SRC="$SRC_BRANCH:$GIT_COMMIT" \
    TREEBOX_TAG=$DOCKER_TAG \
    TREEBOX_SCM=$SCM_TYPE \
  