[PyMongoArrow] Nightly release build failure for 3.14t

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    • Type: Build Failure
    • Resolution: Done
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: pymongoarrow
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    • Python Drivers
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      Context

      The nightly Release workflow has been failing since Sept 26th. The cp314t-macosx_* wheel is failing to build.

      Root cause: the build has no upper bound on scikit-build-core, and its 1.1.0 release (Sep 25) introduced a change to how it handles CMake's Python discovery for free-threaded builds.

      That change exposes a bug in the CMake version pinned on our macOS builders, so CMake can no longer find the free-threaded Python when building the macOS wheel.

      Definition of done

      # A nightly Release run completes fully green, including the cp314t-macosx_* wheel job.
      Build dependency versions are constrained so a new backend release cannot silently break the release pipeline again.

      Pitfalls


      - Do not bump the macOS CMake version as a workaround. The pin exists because libbson requires the older CMake.

            Assignee:
            Steve Silvester
            Reporter:
            Steve Silvester
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              Created:
              Updated:
              Resolved: