code: def _get_install_config():
      
      try:
          data_dir = _get_data_dir()
      except ValueError:
          return None
      config_dir = utils.safe_makedir(os.path.join(data_dir, "config"))
      return os.path.join(config_dir, "install-params.yaml")
docs: Return the YAML configuration file used to store upgrade information.