old_contents: from ._cmd import *
  import core
  from ._log import *
  from ._net import *
  from ._pkg import *
  
  from ._internal import init, step
  
new_contents: from ._cmd import *
  import core
  from ._log import *
  from ._net import *
  from ._pkg import *
  from ._vcs import *
  
  from ._internal import init, step
  
subject: add missing import for virtual services