fix: Pin pip build-isolation cmake to 4.4.0 for the OTIO wheel build - #1376
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The Windows Debug jobs have failed on every nightly since 2026-08-05 with no OpenRV change. Two nightlies of the identical commit 6a3af6e straddle the boundary: Aug 4 passed, Aug 5 failed. OpenTimelineIO is built from source against our custom debug Python, and its setup.py runs find_package(Python ... Interpreter Development.Module) using the cmake wheel pip installs into the isolated build environment -- not the cmake driving the outer OpenRV build, and not the msys2 one. That resolution is unpinned, so it floats with PyPI. cmake 4.4.2 was published to PyPI on 2026-08-04T06:13:31Z, between those two runs. It contains "FindPython: Add support for pydebug ABI flag on Windows" (Kitware/CMake 84cb7e262), which reworks how the debug Python artifacts are located and makes that find_package fail: Could NOT find Python (missing: Interpreter Development.Module) (found version "3.11.9") Constrain the build environment via PIP_CONSTRAINT to cmake==4.4.0, the last version known good on Windows, Linux and macOS. Release builds are unaffected because they never build OTIO against a debug interpreter. Signed-off-by: Cédrik Fuoco <cedrik.fuoco@autodesk.com>
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Pin pip build-isolation cmake to 4.4.0 for the OTIO wheel build
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Summarize your change.
Constrain the build environment via PIP_CONSTRAINT to cmake==4.4.0, the last version known good on Windows.
Release builds are unaffected because they never build OTIO against a debug interpreter.
Describe the reason for the change.
The Windows Debug jobs have failed on every nightly since 2026-08-05 with no OpenRV change. Two nightlies of the identical commit 6a3af6e straddle the boundary: Aug 4 passed, Aug 5 failed.
cmake 4.4.2 was published to PyPI on 2026-08-04T06:13:31Z, between those two runs. It contains "FindPython: Add support for pydebug ABI flag on Windows" (Kitware/CMake 84cb7e262), which reworks how the debug Python artifacts are located
Describe what you have tested and on which operating system.
CI
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