mkvirtualenv报错ModuleNotFoundError: No module named 'pkgutil'

安装virtualenvwrapper-win后, mkvirtualenv创建虚拟环境时, 发生如下错误: ModuleNotFoundError: No module named 'pkgutil' OSError: Command F:\envs\test1\Scripts\python.exe - setuptools pip wheel failed with error code 1

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