MagicStack / MagicStack/immutables

Build failure on Python 3.14 (no wheels available)

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Description

When installing immutables==0.21 in a Python 3.14 environment (via Pixi
or pip), the build fails because there are no prebuilt wheels for Python 3.14, causing a fallback to source compilation.

Error log:
× Failed to build immutables==0.21
╰─▶ Call to setuptools.build_meta.build_wheel failed (exit status: 1)

building 'immutables._map' extension
error: command 'gcc' failed: No such file or directory

Environment:

  • Python: 3.14
  • Package: immutables==0.21
  • Platform: Linux (x86_64)
  • Tool: pixi (similar to pip/conda)
  • Works fine on: Python 3.13

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the installation of immutables==0.21 with Python 3.14 using Pixi or pip on Linux, and compare it with Python 3.13. No source file or test is named; investigate the packaging and wheel-build entry points, with success defined as a working Python 3.14 installation without the reported build failure.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
build-system
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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