Anaconda prompt用豆瓣源下载spacy库时报错[WinError 87] 参数错误，无法安装所依赖的contextvars库

如图，请问应该怎么解决呢？
用的指令是

pip install -i https://pypi.douban.com/simple spacy

可能是兼容性的问题，请参考 您要找的页面不存在 - 简书 https://www.jianshu.com/p/f2e99b67bb8a%EF%BC%8C

或 pytest failed to run on windows: OSError: [WinError 87] · Issue #5724 · pytest-dev/pytest · GitHub I'm using a clean virtual env on windows 7 with python 3.7.4, the pytest is always failed with a OSError as below, on the same machine, i have succeeded to run the pytest on same code with a previou python version, is this related to an ... https://github.com/pytest-dev/pytest/issues/5724
如有帮助，望采纳