anchor.diff:  # XXX: Idem for user env?
   ENV \
     TREEBOX_IMAGE="$IMAGE_NAME" \
  -  TREEBOX_SRC="$SRC_BRANCH:$GIT_COMMIT" \
  +  TREEBOX_SRC="$SOURCE_BRANCH:$GIT_COMMIT" \
     LANG=en_US.UTF-8
   
   # Id: x-docker/0.0.2-dev
  
positive.code: RUN locale-gen en_US.UTF-8
  
  # 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=$SCM_TYPE \
    TREEBOX_SCM_BRANCH=$GIT_BRANCH \
  
negative.code: FROM phusion/baseimage:latest
  
  MAINTAINER B. van Berkum <dev@dotmpe.com>
  
  ARG BUILD_DATE=
  ARG BUILD_CODE=
  ARG IMAGE_NAME=
  ARG GIT_COMMIT=
  #ARG VERSION=
  
  LABEL \
    org.label-schema.description="Lots of dev tooling and a user setup" \
  