old_contents: import mon, pkg
  from install import install, mirror_install, repo_install
  from uninstall import uninstall
  
  # Allow to set some information about this distro
  #
  
  distro = None
  release = None
  codename = None
  
new_contents: import mon, pkg
  from install import install, mirror_install, repo_install, repository_url_part
  from uninstall import uninstall
  
  # Allow to set some information about this distro
  #
  
  distro = None
  release = None
  codename = None
  
subject: add the import for easier testing