anchor.diff:  ARG description="Docker image with CM build environment"
   ARG external_dir="include"
   ARG internal_dir=".init-cm"
  +ARG shared_dir="shared"
   ARG user="docker-cm"
   ARG version="0.0-AURORA"
   ARG work_dir="android"
  
positive.code:       version=$version
  
  # Install commons build dependencies
  RUN apt-get update && apt-get install -y --no-install-recommends\
      apt-utils \
      bison \
      build-essential \
  
negative.code:     echo ". $INIT_DIR/init-environment.sh" >> $USER_HOME/.profile
  
  # Volumes defenition
  VOLUME $SHARED_DIR
  VOLUME $WORK_DIR
  VOLUME $CCACHE_DIR
  VOLUME $OUT_DIR
  
  # Configure start up
  USER $USER
  