Failed to run built Python - `AttributeError: module 'sys' has no attribute 'winver'` · Issue #431 · python-cmake-buildsystem/python-cmake-buildsystem · GitHub

Tested on 3.12.10 and 3.11.0 - build suceeds, but there are some AttributeError: module 'sys' has no attribute 'winver' errors during installation (I assume when Python itself is executed to launch some commands / do tests) and running any commands to already installed Python fails with the same error.

Below is .yml for github action to reproduce the problem:

name: build-cmake-python

on:
  workflow_dispatch:

jobs:
  build-cmake-python:
    runs-on: windows-2022

    steps:
    - name: Configure build
      run: |
        Set-PSDebug -Trace 1
        $ErrorActionPreference = "Stop"
        $PSNativeCommandUseErrorActionPreference = $true

        curl -L https://raw.githubusercontent.com/Andrej730/vcvarsall-pwsh/refs/heads/master/generate-vcvarsall-env.ps1 -o generate-vcvarsall-env.ps1
        pwsh -NoProfile -File .\generate-vcvarsall-env.ps1
        . .\vcvarsall-env.ps1

        git clone https://github.com/python-cmake-buildsystem/python-cmake-buildsystem --depth 1
        cd python-cmake-buildsystem
        mkdir build && cd build
        cmake .. -DCMAKE_INSTALL_PREFIX="install"
        cmake --build . --config Release -- /m
        cmake --install . --config Release
        ./install/bin/python.exe --version
        ./install/bin/python.exe -c "print(42)"

Here are example logs - https://github.com/Andrej730/artifact-test-repo/actions/runs/19988079925/job/57324841696

Python runtime state: initialized
Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1176, in exec_module
  File "<frozen site>", line 636, in <module>
  File "<frozen site>", line 622, in main
  File "<frozen site>", line 361, in addusersitepackages
  File "<frozen site>", line 348, in getusersitepackages
  File "<frozen site>", line 313, in _get_path
AttributeError: module 'sys' has no attribute 'winver'
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/Lib/Tools/scripts/run_tests.py
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/bin/venvlauncher.exe
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/bin/venvwlauncher.exe
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/bin/pylauncher.exe
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/bin/pywlauncher.exe
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/Lib/lib-dynload
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/share/python312/PythonTargets.cmake
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/share/python312/PythonTargets-release.cmake
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/share/python312/PythonConfig.cmake
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/share/python312/PythonConfigVersion.cmake
-- Installing: D:/a/artifact-test-repo/artifact-test-repo/python-cmake-buildsystem/build/install/Lib/LICENSE.txt
DEBUG:   16+  >>>> ./install/bin/python.exe --version

Python 3.12.10
DEBUG:   17+  >>>> ./install/bin/python.exe -c "print(42)"

Fatal Python error: init_import_site: Failed to import the site module
Python runtime state: initialized
Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1176, in exec_module
  File "<frozen site>", line 636, in <module>
  File "<frozen site>", line 622, in main
  File "<frozen site>", line 361, in addusersitepackages
  File "<frozen site>", line 348, in getusersitepackages
  File "<frozen site>", line 313, in _get_path
AttributeError: module 'sys' has no attribute 'winver'

Failed to run built Python - `AttributeError: module 'sys' has no attribute 'winver'` · Issue #431 · python-cmake-buildsystem/python-cmake-buildsystem · GitHub

Uh oh!

Failed to run built Python - AttributeError: module 'sys' has no attribute 'winver' #431

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Failed to run built Python - `AttributeError: module 'sys' has no attribute 'winver'` · Issue #431 · python-cmake-buildsystem/python-cmake-buildsystem · GitHub

Uh oh!

Failed to run built Python - AttributeError: module 'sys' has no attribute 'winver' #431

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