anchor.diff:  ENV BUILD_USER_GROUP users
   ENV BUILD_DOCKER_GROUP docker
   ENV BUILD_DOCKER_GROUP_ID 1001
  -ENV UMPIRE_VERSION 0.4.4
   
   # Create the docker group
   RUN groupadd -g $BUILD_DOCKER_GROUP_ID $BUILD_DOCKER_GROUP
  
positive.code: # Install a base set of packages from the default repo
  COPY yum-packages.list /tmp/yum.packages.list
  RUN chmod +r /tmp/yum.packages.list
  RUN yum install -y `cat /tmp/yum.packages.list`
  
  # Install subversion, this needs to be done this way as it tries to install a broken package
  RUN yum install -y --nodeps subversion
  
negative.code:     python2.7 ./get-pip.py
  
  # Install umpire
  ENV UMPIRE_VERSION 0.5.0a2
  RUN pip2.7 install umpire==${UMPIRE_VERSION}
  
  # Create the folder we use for Jenkins workspaces across all nodes
  