Bug report

Bug description:

PEP 739 requires:

Starting from Python 3.14, a file named build-details.json following the format specified in this PEP, or a future version, MUST be installed in the platform-independent standard library directory (stdlib, eg. /usr/lib/python3.14/build-details.json), UNLESS unfeasible due to technical limitations.

It seems the Windows implementation of this didn't happen (c.f. @zooba's comment). Marking as a potential release blocker, cc @hugovk for opinion vs delaying to 3.14.1.

A

CPython versions tested on:

3.14

Operating systems tested on:

Windows

Linked PRs

• gh-138489: Install build-details.json on Windows #138490
• gh-138489: Add missing build-details.json step for building wasm #139302
• [3.14] gh-138489: Add missing build-details.json step for building wasm (GH-139302) #139557