Drop "--user-mirrors" as it is deprecated in pip. Error message:
Drop "--user-mirrors" as it is deprecated in pip. Error message:

--use-mirrors has been deprecated and will be removed in the future. Explicit uses of --index-url and/or --extra-index-url is suggested.

s2i2-hep/s2i2-hep.github.io-source,s2i2-hep/s2i2-hep.github.io-source,s2i2-hep/s2i2-hep.github.io-source