Without it, we will generate invalid build information for sys.version

Fixes a regression in issue #22765.  Patch by Vinson Lee.

Fixes a regression in issue #22765.  Patch by Vinson Lee.

Patch by Eldar Abusalimov.

(currently only used for builds with <= 10.5 deployment targets)

clock resolution on Windows

on Windows

values (like 0.9.8zc).

pass -I or -E to the child process by default when the environment is required
for the child process interpreter to function properly.