On Fri, Jun 16, 2017, at 10:01 PM, Nathaniel Smith wrote:

On Jun 16, 2017 12:13 PM, "Daniel Holth" <dholth@gmail.com> wrote:

Build systems should be able to run under a different version of Python than the one that is running 'pip install'. Does PEP 517 have anything to say about that?

No, and I don't think it should.

I agree. This would add considerable complexity to the spec, and then create a headache for frontend implementors - how would pip organise running a backend on another version of Python?