code: func systemSpecificLaunch(c context.Context, ve *venv.Env, cl *python.CommandLine, env environ.Env, dir string) error {
  	return Exec(c, ve.Interpreter(), cl, env, dir, nil)
  }
docs: // systemSpecificLaunch launches the process described by "cmd" while ensuring
  // that the VirtualEnv lock is held throughout its duration (best effort).
  //
  // On Windows, we don't forward signals. Forwarding signals on Windows is
  // nuanced. For now, we won't, since sending them via Python is similarly
  // nuanced and not commonly done.
  //
  // For more discussion, see:
  // https://github.com/golang/go/issues/6720
  //
  // On Windows, we launch it as a child process and interpret any signal that we
  // receive as terminal, cancelling the child.