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PIP_NO_CACHE_DIR and PIP_NO_BUILD_ISOLATION behave opposite to how they read #5735
@sinscary Feel free to pick this up. But please be aware of the referenced discussions - in particular, #5385 (comment) points out that there's quite likely code that depends on the current behaviour, so something simple like switching the meaning of "yes" and "no" for the environment variables isn't going to be acceptable.
referenced this issue
Oct 14, 2018
The "reversal" in meaning of the environment variables doesn't seem to affect all of the environment variables, as the title of this issue suggests.
I believe only
And similarly for
This doesn't seem to be true for--