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Remove the Setuptools cap for Python 3.12 and newer - #1275
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The Setuptools upper bound prevents source builds in environments that constrain build dependencies to a current release. Remove it so those builds can use Setuptools 81. A headless wheel built and passed an installed import and resize check on macOS arm64 with CPython 3.12, Setuptools 81, scikit-build 0.19.1, and Wheel 0.48.0. The same checks also passed with Wheel 0.41.3, reusing the native build tree.
asmorkalov
approved these changes
Nov 11, 2026
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The
setuptools<70requirement prevents source builds on Python 3.12 and newer when downstream build environments require a current Setuptools release. Remove the upper bound so those builds can use Setuptools 81.Validated this change on current 4.x with headless wheel builds on macOS arm64 and CPython 3.12.13. Both isolated build environments used Setuptools 81.0.0, scikit-build 0.19.1, and NumPy 2.0.2:
The older build failure reported in #1069 used OpenCV 4.10 and a different dependency closure. These runs validate current source with the versions above; they do not reproduce that historical environment or establish compatibility with every admitted scikit-build version.
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