Re: python3.13 fails to build on macOS 26

[Greg Troxel <gdt%lexort.com@localhost>]

Greg Troxel <gdt%lexort.com@localhost> writes:

> and then expat_config.h is not in bl3 and the build doesn't find it.

This is because python wants newfangled expat_config.h, missing in macOS
system expat (and NetBSD system expat until well after 11).  I have
extended the "prefer pkgsrc" conditional and not yet committed it.

The next  problem is

  [ERROR] _elementtree failed to import: pyexpat version is incompatible
  Following modules built successfully but were removed because they could not be imported:
  _elementtree

and I continue to wonder if anyone has built python313 on macOS 26,
using default bootstrap settings.