# \#windows

**URL:** https://discourse.vtk.org/tag/windows/48.md

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## [VTK build fails on Windows when Python type hints are requested (VTK\_BUILD\_PYI\_FILES)](https://discourse.vtk.org/t/vtk-build-fails-on-windows-when-python-type-hints-are-requested-vtk-build-pyi-files/16192)

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**Author:** [@scotsman60](https://discourse.vtk.org/u/scotsman60)\
**Replies:** 2\
**Last updated:** [December 22, 2025, 3:24pm UTC](https://discourse.vtk.org/t/vtk-build-fails-on-windows-when-python-type-hints-are-requested-vtk-build-pyi-files/16192 "2025-12-22T15:24:36Z")

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Hello, I’m building VTK 9.5.2 on Windows and all is well until I request Python type hints with VTK\_BUILD\_PYI\_FILES. The build fails with the following error Severity Code Description Project File Line Suppression Sta…