[eesmith]

That's possible with 3.8's PYTHONPYCACHEPREFIX, yes?

Perhaps it's worthwhile for someone to blog about this more/promote this as a best practice? Though what's missing is the hook to connected it as appropriate for the given platform.

I see now that "OS-specific" was meant to be interpreted as "the OS-defined mechanism to find a cache directory", not "a cache directory which differs for each operating system".

I would not have been confused by the term "platform dependent", which is what Python's tmpdir documentation uses, as in: "The default directory is chosen from a platform-dependent list" at https://docs.python.org/3/library/tempfile.html?highlight=tm... .