cibuildwheel

• ✨ Adds pyodide-build as a separate build-frontend, now the default frontend for Pyodide, with verbosity flags handling. Any other frontend is ignored with a warning on Pyodide. (#2609, #2945)
• 🔐 Uses digests instead of tags for pinned container images, strengthening supply-chain security. The human-readable tags remain as comments in pinned_docker_images.cfg. (#2915)
• 🐛 Fixes platform-specific test-runtime environment variables (e.g. CIBW_TEST_RUNTIME_ANDROID) not being honored (#2941)
• 🐛 Fixes quoting of test-requires and audit-requires so PEP 508 specifiers containing spaces work (#2913)
• 🐛 Makes archs parsing case-insensitive and platform-aware, so e.g. arm64 works on Windows (#2920)
• 🐛 Uses an absolute path for the {project} placeholder in config-settings (#2934)
• 🐛 Validates the pyodide-version option against the build identifier with a clear error (#2925)
• 🐛 Fixes PyPy installs on macOS after PyPy switched its downloads from .tar.bz2 to .tar.gz (#2939)
• 🐛 Makes a matching python3-config available in the build and test venvs on macOS (#2922)
• 🛠 Updates dependencies and container pins (#2917, #2935, #2939)
• 🛠 Updates Android tests to current Python versions and the new test repository URL (#2933)
• 🛠 Drops the orjson dependency, no longer used by mypy 2+ (#2923)
• 📚 Builds the docs with properdocs, a MkDocs fork (#2946)
• 📚 Adds the missing cp314-pyodide_wasm32 entry to the build identifier table (#2947)
• 📚 Removes outdated notes about the pip wheel build frontend and ClearLinux (#2926)
• 💼 Adds a "CI: PyPy EoL" PR label to run PyPy EoL tests on PRs (#2930)
• 💼 Updates CI action pins and pre-commit hooks (#2914, #2932, #2938, #2940, #2942, #2943)

• ✨ Updates Pyodide to the final 314.0.0 release, so Pyodide 3.14 wheels now build by default without the pyodide-prerelease enable flag. (#2906)
• 🐛 Raises clear errors when a build produces no wheel, instead of failing later with a confusing message (#2909)
• 🛠 Speeds up CLI startup through lazy imports on Python 3.15 (#2797)
• 📚 Adds an FAQ section on caching cibuildwheel's downloaded tools with CIBW_CACHE_PATH (#2842)
• 📚 Documentation improvements: clarifies which shell is used for command options, clarifies environment variable precedence, and fixes a dead Pyodide env info link (#2904, #2905, #2911)

See @henryiii's release post for more info on new features!

• 🌟 Adds wheel auditing with abi3audit as a default after the repair step, with new audit-requires and audit-command options (#2805)

• 🌟 Adds pyemscripten platform tag support (PEP 783), updates Pyodide to 314.0.0a2, and adds a pyodide-eol enable flag for building end-of-life Pyodide versions (#2812, #2848)

• 🌟 Sets up delvewheel as the default repair-wheel-command for Windows, so extension module DLLs are now bundled automatically. Skip by setting it to empty if not needed. (#2831)

• ✨ Adds CPython 3.15 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.15.0b2. (#2833, #2850)

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.15 will be available in cibuildwheel without the flag.

• ✨ Adds CPython 3.15 support for iOS and Android (#2857, #2858)

• ✨ Adds Android improvements for building NumPy and related packages, including auditwheel support, pkg-config and Fortran configuration, and the xbuild-files option (#2695)

• ✨ Adds CIBUILDWHEEL_BUILD_IDENTIFIER environment variable set to the current build identifier (e.g. cp311-manylinux_x86_64) during per-build steps (#2872)

• ✨ Adds {project} and {package} placeholders to config-settings (#2827)

• ⚠️ Drops support for Python 3.8 (#2686)

• ⚠️ Removes the experimental CPython 3.13 free-threading builds and the cpython-freethreading enable option. CPython 3.14+ free-threading support remains available without the enable flag. (#2684)

• ⚠️ Drops support for Cirrus CI, which is shutting down June 1, 2026 (#2817)

• ⚠️ Drops GraalPy 3.11 (gp311) support, as agreed in #2741, and removes GraalPy 24-only workarounds (#2895)

• 🔐 Adds SHA256 verification for direct downloads of Python interpreters, virtualenv, and python-build-standalone assets (#2873)

• 🔐 Adds tarfile extraction filter for safe archive extraction (#2856)

• 🐛 Fixes UV_PYTHON not being set for before-build on Linux when using uv as the build-frontend (#2830)

• 🐛 Fixes detection of musl libc when downloading python-build-standalone, which previously always selected the gnu asset on musl hosts like Alpine (#2889)

• 🐛 Fixes config-settings expansion when {project} or {package} contains spaces or backslashes (#2886)

• 🐛 Prevents deadlock when linux32 fails and forwards platform args to the sanity check (#2880, #2888)

• 🐛 Fixes container resource leaks on start failure and during teardown (#2879, #2887)

• 🐛 Removes potential partial cache-population in case of error (#2892)

• 🐛 Raises a clear error when ANDROID_API_LEVEL is not an integer (#2891)

• 🐛 Replaces assert with proper exception in python-build-standalone (#2859)

• 🐛 Uses ConfigurationError when package_dir is outside cwd instead of a generic Exception (#2898)

• 🛠 Updates dependencies and container pins (#2893, #2882, #2874, #2868, #2862, #2884, #2845, #2837, #2818, #2810, #2838, #2813)

• 🛠 Updates Android to Python 3.13.13 and 3.14.4 (#2821)

• 🛠 Applies Pyodide-specific patches to the Emscripten toolchain installation (#2800)

• 🛠 Uses python -V -V for Windows build diagnostics (#2832)

• 🛠 Simplifies pinned container image lookup (#2897)

• 🛠 Minor fixups across error messages, OCI container, and options (#2860)

• 💼 Adds PEP 723 metadata for bin/ scripts and drops the bin dependency group (#2819)

• 💼 Improves Azure test reliability with retries and caching (#2890)

• 💼 Fixes Windows GitLab CI test running (#2870)

• 💼 Updates CI action pins and dev dependencies (#2902, #2867, #2851, #2843, #2826, #2823, #2820, #2807)

• 💼 Adds agent and copilot setup files (#2861)

• 💼 Uses if TYPE_CHECKING: blocks (#2866, #2864)

• 🧪 Fixes Android tests using the uv frontend (#2809)

• 🧪 Fixes the update-dependencies workflow to use uv to run nox (#2808)

• 🧪 Adds unit tests for OCIContainer._get_platform_args (#2878)

• 📚 Updates documentation for delvewheel as the default Windows repair-wheel-command, including the build diagram, schema defaults, and legal note (#2877, #2853, #2891)

• 📚 Documents platform-specific before-build configuration (#2834)

• 📚 Updates the "How it works" diagram with details of Android, iOS, and Pyodide builds (#2816)

• 📚 Adds Pyodide icon and regenerates working examples data for Android, iOS, and Pyodide (#2815, #2811)

• 📚 Adds intersphinx support for external documentation linking (#2871)

• 📚 Adds instructions for building CUDA wheels and fixes manylinux container references in FAQ (#2896, #2900)

• 📚 Links back to source in docs (#2806)

• 📚 Removes outdated numpy info (#2855)

• ✨ Adds CPython 3.15 support for iOS and Android (#2857, #2858)
• ✨ Adds Android improvements for building NumPy and related packages, including auditwheel support, pkg-config and Fortran configuration, and the xbuild-files option (#2695)
• ✨ Adds CIBUILDWHEEL_BUILD_IDENTIFIER environment variable set to the current build identifier (e.g. cp311-manylinux_x86_64) during per-build steps (#2872)
• 🔐 Adds SHA256 verification for direct downloads of Python interpreters, virtualenv, and python-build-standalone assets (#2873)
• 🔐 Adds tarfile extraction filter for safe archive extraction (#2856)
• 🐛 Fixes detection of musl libc when downloading python-build-standalone, which previously always selected the gnu asset on musl hosts like Alpine (#2889)
• 🐛 Fixes config-settings expansion when {project} or {package} contains spaces or backslashes (#2886)
• 🐛 Prevents deadlock when linux32 fails and forwards platform args to the sanity check (#2880, #2888)
• 🐛 Fixes container resource leaks on start failure and during teardown (#2879, #2887)
• 🐛 Removes potential partial cache-population in case of error (#2892)
• 🐛 Raises a clear error when ANDROID_API_LEVEL is not an integer (#2891)
• 🐛 Replaces assert with proper exception in python-build-standalone (#2859)
• 🛠 Updates dependencies and container pins (#2893, #2882, #2874, #2868, #2862, #2884)
• 🛠 Minor fixups across error messages, OCI container, and options (#2860)
• 📚 Updates documentation for delvewheel as the default Windows repair-wheel-command, including the build diagram, schema defaults, and legal note (#2877, #2853, #2891)
• 📚 Adds intersphinx support for external documentation linking (#2871)
• 📚 Removes outdated numpy info (#2855)
• 💼 Improves Azure test reliability with retries and caching (#2890)
• 💼 Fixes Windows GitLab CI test running (#2870)
• 💼 Updates CI action pins (#2867)
• 💼 Adds agent and copilot setup files (#2861)
• 💼 Uses if TYPE_CHECKING: blocks (#2866, #2864)
• 🧪 Adds unit tests for OCIContainer._get_platform_args (#2878)

• 🌟 Adds wheel auditing with abi3audit as a default after the repair step, with new audit-requires and audit-command options (#2805)

• 🌟 Adds pyemscripten platform tag support (PEP 783), updates Pyodide to 314.0.0a1, and adds a pyodide-eol enable flag for building end-of-life Pyodide versions (#2812, #2848)

• 🌟 Sets up delvewheel as the default repair-wheel-command for Windows, so extension module DLLs are now bundled automatically. Skip by setting it to empty if not needed. (#2831)

• ✨ Adds CPython 3.15 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.15.0b1. (#2833, #2850)

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds {project} and {package} placeholders to config-settings (#2827)

• ⚠️ Drops support for Python 3.8 (#2686)

• ⚠️ Removes the experimental CPython 3.13 free-threading builds and the cpython-freethreading enable option. CPython 3.14+ free-threading support remains available without the enable flag. (#2684)

• ⚠️ Drops support for Cirrus CI, which is shutting down June 1, 2026 (#2817)

• 🐛 Fixes UV_PYTHON not being set for before-build on Linux when using uv as the build-frontend (#2830)

• 🛠 Updates Android to Python 3.13.13 and 3.14.4 (#2821)

• 🛠 Applies Pyodide-specific patches to the Emscripten toolchain installation (#2800)

• 🛠 Updates dependencies and container pins (#2845, #2837, #2821, #2818, #2810, #2838, #2813)

• 🛠 Uses python -V -V for Windows build diagnostics (#2832)

• 📚 Documents platform-specific before-build configuration (#2834)

• 📚 Updates the "How it works" diagram with details of Android, iOS, and Pyodide builds (#2816)

• 📚 Adds Pyodide icon and regenerates working examples data for Android, iOS, and Pyodide (#2815, #2811)

• 📚 Links back to source in docs (#2806)

• 💼 Adds PEP 723 metadata for bin/ scripts and drops the bin dependency group (#2819)

• 💼 Updates CI action pins and dev dependencies (#2851, #2843, #2826, #2823, #2820, #2807)

• 🧪 Fixes Android tests using the uv frontend (#2809)

• 🧪 Fixes the update-dependencies workflow to use uv to run nox (#2808)

• ⚠️ Building for the experimental CPython 3.13 free-threading variant is now deprecated. That functionality will be removed in the next minor release. The enable option cpython-freethreading is therefore also deprecated. Builds specifying enable = "all" no longer select cpython-freethreading. CPython 3.14 free-threading support remains available without the enable flag. (#2787)
• 🐛 iOS builds will no longer skip repair-wheel-command if it's defined in config (#2761)
• 🐛 Fix bug causing uv to fail when environments define PYTHON_VERSION or UV_PYTHON, conflicting with our venvs (#2795)
• ✨ cibuildwheel prints the selected build identifiers at the start of the build. (#2785)
• 🔐 The GitHub Action now references other actions with a full SHA (#2744)

• 🌟 You can now build wheels using uv as a build frontend. This should improve performance, especially if your project has lots of build dependencies. To use, set build-frontend to uv. (#2322)
• ⚠️ We no longer support running on Travis CI. It may continue working but we don't run tests there anymore so we can't be sure. (#2682)
• ✨ Improvements to building Rust wheels on Android (#2650)
• 🛠 Update Pyodide to 0.29.3 (#2719, #2733)
• 🐛 Fix bug with the GitHub Action on Windows, where PATH was getting unnecessarily changed, causing issues with meson builds. (#2723)
• ✨ Add support for quiet setting on build and uv from the cibuildwheel build-verbosity setting. (#2737)
• 📚 Docs updates, including guidance on using Meson on Windows (#2718)

• 🛠 Update dependencies and container pins, including updating to CPython 3.14.2. (#2708)

• 🐛 Fix an incompatibility with Docker v29 (#2660)
• ✨ Adds test-runtime option, to customise how tests on simulated/emulated environments are run (#2636)
• ✨ Adds support for new manylinux_2_35 images on 32-bit ARM armv7l, offering better C++20 compatibility (#2656)
• ✨ build[uv] is now supported on Android (#2587)
• ✨ You can now install extras (such as uv) with a simple option on the GitHub Action (#2630)
• ✨ {project} and {package} placeholders are now supported in repair-wheel-command (#2589)
• 🛠 The versions set with dependency-versions no longer constrain packages specified by your build-system.requires. Previously, on platforms other than Linux, the constraints in this option would remain in the environment during the build. This has been tidied up make behaviour more consistent between platforms, and to prevent version conflicts. (#2583)
• 🛠 Improve the handling of test-command on Android, enabling more options to be passed (#2590)
• 📚 Docs improvements (#2618)

• 🛠 Update to CPython 3.14.0 final (#2614)
• 🐛 Fix the default MACOSX_DEPLOYMENT_TARGET on Python 3.14 (#2613)
• 📚 Docs improvements (#2617)

• ✨ Adds GraalPy v25 (Python 3.12) support (#2597)
• 🛠 Update to CPython 3.14.0rc3 (#2602)
• 🛠 Adds CPython 3.14.0 prerelease support for Android, and a number of improvements to Android builds (#2568, #2591)
• 🛠 Improvements to testing on Android, passing environment markers when installing the venv, and providing more debug output when build-verbosity is set (#2575)
• ⚠️ PyPy 3.10 was moved to pypy-eol in the enable option, as it is now end-of-life. (#2521)
• 📚 Docs improvements (#2574, #2601, #2598)

• ✨ Add a --clean-cache command to clean up our cache (#2489)
• 🛠 Update Python to 3.14rc2 and other patch version bumps (#2542, #2556)
• 🛠 Update Pyodide to 0.28.2 (#2562, #2558)
• 🐛 Fix resolution with pyodide-build when dependency-versions is set (#2548)
• 🐛 Set CMAKE_FIND_ROOT_PATH_MODE_PACKAGE to BOTH on Android (#2547)
• 🐛 Add patchelf dependency for platforms that can build Android wheels (#2552)
• 🐛 Ignore empty values for CIBW_ARCHS like most other environment variables (#2541)
• 💼 The color and suggest_on_error argparse options are now default in 3.14rc1+ (#2554)
• 💼 Use the virtualenv release URL instead of blob URL (should be more robust) (#2555)
• 🧪 For iOS, lowering to macos-14 is needed for now due to issues with GitHub's runner images (#2557)
• 🧪 Split out platforms iOS and Android in our tests (#2519)
• 🧪 Fix and enable doctests (#2546)
• 📚 Improve our docs on free-threading (#2549)

• 🐛 Fix bug where "latest" dependencies couldn't update to pip 25.2 on Windows (#2537)
• 🧪 Use pytest-rerunfailures to improve some of our iOS/Android tests (#2527, #2539)
• 🧪 Remove some GraalPy Windows workarounds in our tests (#2501)

• ⚠️ Add an error if CIBW_FREE_THREADING_SUPPORT is set; you are likely missing 3.13t wheels, please use the enable/CIBW_ENABLE (#2520)
• 🛠 riscv64 now enabled if you target that architecture, it's now supported on PyPI (#2509)
• 🛠 Add warning when using cpython-experimental-riscv64 (no longer needed) (#2526, #2528)
• 🛠 iOS versions bumped, fixing issues with 3.14 (now RC 1) (#2530)
• 🐛 Fix bug in Android running wheel from our GitHub Action (#2517)
• 🐛 Fix warning when using test-skip of "*-macosx_universal2:arm64" (#2522)
• 🐛 Fix incorrect number of wheels reported in logs, again (#2517)
• 📚 We welcome our Android platform maintainer (#2516)

• 🐛 Fix a bug showing an incorrect wheel count at the end of execution, and misrepresenting test-only runs in the GitHub Action summary (#2512)
• 📚 Docs fix (#2510)

• 🌟 CPython 3.14 wheels are now built by default - without the "cpython-prerelease" enable set. It's time to build and upload these wheels to PyPI! This release includes CPython 3.14.0rc1, which is guaranteed to be ABI compatible with the final release. (#2507) Free-threading is no longer experimental in 3.14, so you have to skip it explicitly with 'cp31?t-*' if you don't support it yet. (#2503)
• 🌟 Adds the ability to build wheels for Android! Set the platform option to android on Linux or macOS to try it out! (#2349)
• 🌟 Adds Pyodide 0.28, which builds 3.13 wheels (#2487)
• ✨ Support for 32-bit manylinux_2_28 (now a consistent default) and manylinux_2_34 added (#2500)
• 🛠 Improved summary, will also use markdown summary output on GHA (#2469)
• 🛠 The riscv64 images now have a working default (as they are now part of pypy/manylinux), but are still experimental (and behind an enable) since you can't push them to PyPI yet (#2506)
• 🛠 Fixed a typo in the 3.9 MUSL riscv64 identifier (cp39-musllinux_ricv64 -> cp39-musllinux_riscv64) (#2490)
• 🛠 Mistyping --only now shows the correct possibilities, and even suggests near matches on Python 3.14+ (#2499)
• 🛠 Only support one output from the repair step on linux like other platforms; auditwheel fixed this over four years ago! (#2478)
• 💼 We now use pattern matching extensively (#2434)
• 📚 We now have platform maintainers for our special platforms and interpreters! (#2481)

• 🛠 Updates CPython 3.14 prerelease to 3.14.0b3 (#2471)
• ✨ Adds a CPython 3.14 prerelease iOS build (only when prerelease builds are enabled) (#2475)

See @henryiii's release post for more info on new features!

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out! (#2286, #2363, #2432)

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538, #2411, #2414)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b2. (#2390)

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option, and changes the working directory for tests. (#2062, #2284, #2437)

  • If this option is set, cibuildwheel will copy the files and folders specified in test-sources into the temporary directory we run from. This is required for iOS builds, but also useful for other platforms, as it allows you to avoid placeholders.
  • If this option is not set, behaviour matches v2.x - cibuildwheel will run the tests from a temporary directory, and you can use the {project} placeholder in the test-command to refer to the project directory. (#2420)

• ✨ Adds dependency-versions inline syntax (#2122)

• ✨ Improves support for Pyodide builds and adds the experimental pyodide-version option, which allows you to specify the version of Pyodide to use for builds. (#2002)

• ✨ Add pyodide-prerelease enable option, with an early build of 0.28 (Python 3.13). (#2431)

• ✨ Adds the test-environment option, which allows you to set environment variables for the test command. (#2388)

• ✨ Adds the xbuild-tools option, which allows you to specify tools safe for cross-compilation. Currently only used on iOS; will be useful for Android in the future. (#2317)

• 🛠 The default manylinux image has changed from manylinux2014 to manylinux_2_28. (#2330)

• 🛠 EOL images manylinux1, manylinux2010, manylinux_2_24 and musllinux_1_1 can no longer be specified by their shortname. The full OCI name can still be used for these images, if you wish. (#2316)

• 🛠 Invokes build rather than pip wheel to build wheels by default. You can control this via the build-frontend option. You might notice that you can see your build log output now! (#2321)

• 🛠 Build verbosity settings have been reworked to have consistent meanings between build backends when non-zero. (#2339)

• 🛠 Removed the CIBW_PRERELEASE_PYTHONS and CIBW_FREE_THREADED_SUPPORT options - these have been folded into the enable option instead. (#2095)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• 🛠 Use the standard Schema line for the integrated JSONSchema. (#2433)

• ⚠️ Dropped support for building Python 3.6 and 3.7 wheels. If you need to build wheels for these versions, use cibuildwheel v2.23.3 or earlier. (#2282)

• ⚠️ The minimum Python version required to run cibuildwheel is now Python 3.11. You can still build wheels for Python 3.8 and newer. (#1912)

• ⚠️ 32-bit Linux wheels no longer built by default - the arch was removed from "auto". It now requires explicit "auto32". Note that modern manylinux images (like the new default, manylinux_2_28) do not have 32-bit versions. (#2458)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol. (#2095)

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates. (#2280)

• 📚 Use Python 3.14 color output in docs CLI output. (#2407)

• 📚 Docs now primarily use the pyproject.toml name of options, rather than the environment variable name. (#2389)

• 📚 README table now matches docs and auto-updates. (#2427, #2428)

Not yet released, but available for testing.

Note - when using a beta version, be sure to check the latest docs, rather than the stable version, which is still on v2.X.

<!-- note to self, when doing final release, change to docs URLs in this section to the stable version! -->

If you've used previous versions of the beta:

• ⚠️ Previous betas of v3.0 changed the working directory for tests. This has been rolled back to the v2.x behaviour, so you might need to change configs if you adapted to the beta 1 or 2 behaviour. See issue #2406 for more information.
• ⚠️ GraalPy shipped with the identifier gp242-* in previous betas, this has been changed to gp311_242-* to be consistent with other interpreters, and to fix a bug with GraalPy and project requires-python detection. If you were using GraalPy, you might need to update your config to use the new identifier.
• ⚠️ test-sources now uses project directory instead of the package directory (matching the docs).
• ⚠️ 32-bit linux builds were removed from "auto" (the default), now require "auto32" or explicit archs, as modern manylinux images (including our new default) do not support them.

v3.0.0rc3

11 June 2025

• 🛠 32-bit linux builds removed from "auto", requires explicit "auto32". (#2458)
• 📚 Warn that pyodide-version is experimental. (#2450)

v3.0.0rc2

6 June 2025

• 🛠 Updates to dependencies including Pyodide, python-build-standalone, and iOS support package. (#2449)

v3.0.0rc1

5 June 2025

• 🛠 Updates to dependencies including CPython 3.13.4, pyodide-build and iOS support package. (#2443)

v3.0.0b5

3 June 2025

• ✨ Support multiple commands on iOS, joined by &&, like the other platforms. (#2432)
• ✨ Add pyodide-prerelease enable option, with an early build of 0.28 (Python 3.13). (#2431)
• 🛠 test-sources now uses the project directory instead of the package directory (matching the docs). (#2437)
• 🛠 Fixed a bug with GraalPy if vsdevcmd prints an error. Cirrus CI works again. (#2414)
• 🛠 Use the standard Schema line for the integrated JSONSchema. (#2433)
• 📚 Use Python 3.14 color output in docs CLI output. (#2407)

v3.0.0b4

29 May 2025

• 🛠 Dependency updates, including Python 3.14.0b2. (#2371)
• 🛠 Remove the addition of PYTHONSAFEPATH to test-environment. (#2429)
• 📚 README table now matches docs and auto-updates. (#2427, #2428)

v3.0.0b3

28 May 2025

• 🛠 Reverts the test working dir (when test-sources isn't set) to a temporary dir, rather than the project. (#2420)
• 📚 Docs now primarily use the pyproject.toml name of options, rather than the environment variable name. (#2389)

v3.0.0b2

25 May 2025

• ✨ Adds the CIBW_TEST_ENVIRONMENT option, which allows you to set environment variables for the test command. cibuildwheel now sets PYTHONSAFEPATH=1 in test environments by default, to avoid picking up package imports from the local directory - we want to test the installed wheel, not the source tree! You can change that, or any other environment variable in the test environment using this option. (#2388)
• ✨ Improves support for Pyodide builds and adds the CIBW_PYODIDE_VERSION option, which allows you to specify the version of Pyodide to use for builds. (#2002)

v3.0.0b1

19 May 2025

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out!

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option, and changes the working directory for tests.

  • If this option is set, cibuildwheel will copy the files and folders specified in test-sources into a temporary directory, and run the tests from there. This is required for iOS builds, but also useful for other platforms, as it allows you to test the installed wheel without any chance of accidentally importing from the source tree.
  • ~If this option is not set, cibuildwheel will run the tests in the source tree. This is a change from the previous behavior, where cibuildwheel would run the tests from a temporary directory. We're still investigating what's best here, so if you encounter any issues with this, please let us know in issue #2406.~
  • If this option is not set, behaviour matches v2.x - cibuildwheel will run the tests from a temporary directory, and you can use the {project} placeholder in the test-command to refer to the project directory.

• ✨ Added´ dependency-versions inline syntax (#2123)

• 🛠 The default manylinux image has changed from manylinux2014 to manylinux_2_28 (#2330)

• 🛠 Invokes build rather than pip wheel to build wheels by default. You can control this via the build-frontend option. You might notice that you can see your build log output now! (#2321)

• 🛠 Removed the CIBW_PRERELEASE_PYTHONS and CIBW_FREE_THREADED_SUPPORT options - these have been folded into the enable option instead. (#2095)

• 🛠 EOL images manylinux1, manylinux2010, manylinux_2_24 and musllinux_1_1 can no longer be specified by their shortname. The full OCI name can still be used for these images, if you wish (#2316)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• ⚠️ Dropped support for building Python 3.6 and 3.7 wheels. If you need to build wheels for these versions, use cibuildwheel v2.23.3 or earlier. (#2282)

• ⚠️ The minimum Python version required to run cibuildwheel is now Python 3.11. You can still build wheels for Python 3.8 and newer. (#1912)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol. (#2095)

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates (#2280)

Not yet released, but available for testing.

Note - when using a beta version, be sure to check the latest docs, rather than the stable version, which is still on v2.X.

<!-- note to self, when doing final release, change to docs URLs in this section to the stable version! -->

If you've used previous versions of the beta:

• ⚠️ Previous betas of v3.0 changed the working directory for tests. This has been rolled back to the v2.x behaviour, so you might need to change configs if you adapted to the beta 1 or 2 behaviour. See issue #2406 for more information.
• ⚠️ GraalPy shipped with the identifier gp242-* in previous betas, this has been changed to gp311_242-* to be consistent with other interpreters, and to fix a bug with GraalPy and project requires-python detection. If you were using GraalPy, you might need to update your config to use the new identifier.
• ⚠️ test-sources now uses project directory instead of the package directory (matching the docs).

v3.0.0rc2

6 June 2025

• 🛠 Updates to dependencies including Pyodide, python-build-standalone, and iOS support package. (#2449)

v3.0.0rc1

5 June 2025

• 🛠 Updates to dependencies including CPython 3.13.4, pyodide-build and iOS support package. (#2443)

v3.0.0b5

3 June 2025

• ✨ Support multiple commands on iOS, joined by &&, like the other platforms. (#2432)
• ✨ Add pyodide-prerelease enable option, with an early build of 0.28 (Python 3.13). (#2431)
• 🛠 test-sources now uses the project directory instead of the package directory (matching the docs). (#2437)
• 🛠 Fixed a bug with GraalPy if vsdevcmd prints an error. Cirrus CI works again. (#2414)
• 🛠 Use the standard Schema line for the integrated JSONSchema. (#2433)
• 📚 Use Python 3.14 color output in docs CLI output. (#2407)

v3.0.0b4

29 May 2025

• 🛠 Dependency updates, including Python 3.14.0b2. (#2371)
• 🛠 Remove the addition of PYTHONSAFEPATH to test-environment. (#2429)
• 📚 README table now matches docs and auto-updates. (#2427, #2428)

v3.0.0b3

28 May 2025

• 🛠 Reverts the test working dir (when test-sources isn't set) to a temporary dir, rather than the project. (#2420)
• 📚 Docs now primarily use the pyproject.toml name of options, rather than the environment variable name. (#2389)

v3.0.0b2

25 May 2025

• ✨ Adds the CIBW_TEST_ENVIRONMENT option, which allows you to set environment variables for the test command. cibuildwheel now sets PYTHONSAFEPATH=1 in test environments by default, to avoid picking up package imports from the local directory - we want to test the installed wheel, not the source tree! You can change that, or any other environment variable in the test environment using this option. (#2388)
• ✨ Improves support for Pyodide builds and adds the CIBW_PYODIDE_VERSION option, which allows you to specify the version of Pyodide to use for builds. (#2002)

v3.0.0b1

19 May 2025

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out!

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option, and changes the working directory for tests.

  • If this option is set, cibuildwheel will copy the files and folders specified in test-sources into a temporary directory, and run the tests from there. This is required for iOS builds, but also useful for other platforms, as it allows you to test the installed wheel without any chance of accidentally importing from the source tree.
  • ~If this option is not set, cibuildwheel will run the tests in the source tree. This is a change from the previous behavior, where cibuildwheel would run the tests from a temporary directory. We're still investigating what's best here, so if you encounter any issues with this, please let us know in issue #2406.~
  • If this option is not set, behaviour matches v2.x - cibuildwheel will run the tests from a temporary directory, and you can use the {project} placeholder in the test-command to refer to the project directory.

• ✨ Added´ dependency-versions inline syntax (#2123)

• 🛠 The default manylinux image has changed from manylinux2014 to manylinux_2_28 (#2330)

• 🛠 Invokes build rather than pip wheel to build wheels by default. You can control this via the build-frontend option. You might notice that you can see your build log output now! (#2321)

• 🛠 Removed the CIBW_PRERELEASE_PYTHONS and CIBW_FREE_THREADED_SUPPORT options - these have been folded into the enable option instead. (#2095)

• 🛠 EOL images manylinux1, manylinux2010, manylinux_2_24 and musllinux_1_1 can no longer be specified by their shortname. The full OCI name can still be used for these images, if you wish (#2316)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• ⚠️ Dropped support for building Python 3.6 and 3.7 wheels. If you need to build wheels for these versions, use cibuildwheel v2.23.3 or earlier. (#2282)

• ⚠️ The minimum Python version required to run cibuildwheel is now Python 3.11. You can still build wheels for Python 3.8 and newer. (#1912)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol. (#2095)

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates (#2280)

Not yet released, but available for testing.

Note - when using a beta version, be sure to check the latest docs, rather than the stable version, which is still on v2.X.

<!-- note to self, when doing final release, change to docs URLs in this section to the stable version! -->

If you've used previous versions of the beta:

• ⚠️ Previous betas of v3.0 changed the working directory for tests. This has been rolled back to the v2.x behaviour, so you might need to change configs if you adapted to the beta 1 or 2 behaviour. See issue #2406 for more information.
• ⚠️ GraalPy shipped with the identifier gp242-* in previous betas, this has been changed to gp311_242-* to be consistent with other interpreters, and to fix a bug with GraalPy and project requires-python detection. If you were using GraalPy, you might need to update your config to use the new identifier.
• ⚠️ test-sources now uses project directory instead of the package directory (matching the docs).

v3.0.0rc1

5 June 2025

• 🛠 Updates to dependencies including CPython 3.13.4, pyodide-build and iOS support package. (#2443)

v3.0.0b5

3 June 2025

• ✨ Support multiple commands on iOS, joined by &&, like the other platforms. (#2432)
• ✨ Add pyodide-prerelease enable option, with an early build of 0.28 (Python 3.13). (#2431)
• 🛠 test-sources now uses the project directory instead of the package directory (matching the docs). (#2437)
• 🛠 Fixed a bug with GraalPy if vsdevcmd prints an error. Cirrus CI works again. (#2414)
• 🛠 Use the standard Schema line for the integrated JSONSchema. (#2433)
• 📚 Use Python 3.14 color output in docs CLI output. (#2407)

v3.0.0b4

29 May 2025

• 🛠 Dependency updates, including Python 3.14.0b2. (#2371)
• 🛠 Remove the addition of PYTHONSAFEPATH to test-environment. (#2429)
• 📚 README table now matches docs and auto-updates. (#2427, #2428)

v3.0.0b3

28 May 2025

• 🛠 Reverts the test working dir (when test-sources isn't set) to a temporary dir, rather than the project. (#2420)
• 📚 Docs now primarily use the pyproject.toml name of options, rather than the environment variable name. (#2389)

v3.0.0b2

25 May 2025

• ✨ Adds the CIBW_TEST_ENVIRONMENT option, which allows you to set environment variables for the test command. cibuildwheel now sets PYTHONSAFEPATH=1 in test environments by default, to avoid picking up package imports from the local directory - we want to test the installed wheel, not the source tree! You can change that, or any other environment variable in the test environment using this option. (#2388)
• ✨ Improves support for Pyodide builds and adds the CIBW_PYODIDE_VERSION option, which allows you to specify the version of Pyodide to use for builds. (#2002)

v3.0.0b1

19 May 2025

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out!

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option, and changes the working directory for tests.

  • If this option is set, cibuildwheel will copy the files and folders specified in test-sources into a temporary directory, and run the tests from there. This is required for iOS builds, but also useful for other platforms, as it allows you to test the installed wheel without any chance of accidentally importing from the source tree.
  • ~If this option is not set, cibuildwheel will run the tests in the source tree. This is a change from the previous behavior, where cibuildwheel would run the tests from a temporary directory. We're still investigating what's best here, so if you encounter any issues with this, please let us know in issue #2406.~
  • If this option is not set, behaviour matches v2.x - cibuildwheel will run the tests from a temporary directory, and you can use the {project} placeholder in the test-command to refer to the project directory.

• ✨ Added´ dependency-versions inline syntax (#2123)

• 🛠 The default manylinux image has changed from manylinux2014 to manylinux_2_28 (#2330)

• 🛠 Invokes build rather than pip wheel to build wheels by default. You can control this via the build-frontend option. You might notice that you can see your build log output now! (#2321)

• 🛠 Removed the CIBW_PRERELEASE_PYTHONS and CIBW_FREE_THREADED_SUPPORT options - these have been folded into the enable option instead. (#2095)

• 🛠 EOL images manylinux1, manylinux2010, manylinux_2_24 and musllinux_1_1 can no longer be specified by their shortname. The full OCI name can still be used for these images, if you wish (#2316)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• ⚠️ Dropped support for building Python 3.6 and 3.7 wheels. If you need to build wheels for these versions, use cibuildwheel v2.23.3 or earlier. (#2282)

• ⚠️ The minimum Python version required to run cibuildwheel is now Python 3.11. You can still build wheels for Python 3.8 and newer. (#1912)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol. (#2095)

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates (#2280)

Not yet released, but available for testing.

Note - when using a beta version, be sure to check the latest docs, rather than the stable version, which is still on v2.X.

<!-- note to self, when doing final release, change to docs URLs in this section to the stable version! -->

If you've used previous versions of the beta:

• ⚠️ Previous betas of v3.0 changed the working directory for tests. This has been rolled back to the v2.x behaviour, so you might need to change configs if you adapted to the beta 1 or 2 behaviour. See issue #2406 for more information.
• ⚠️ GraalPy shipped with the identifier gp242-* in previous betas, this has been changed to gp311_242-* to be consistent with other interpreters, and to fix a bug with GraalPy and project requires-python detection. If you were using GraalPy, you might need to update your config to use the new identifier.
• ⚠️ test-sources now uses project directory instead of the package directory (matching the docs).

v3.0.0b5

3 June 2025

• ✨ Support multiple commands on iOS, joined by &&, like the other platforms. (#2432)
• ✨ Add pyodide-prerelease enable option, with an early build of 0.28 (Python 3.13). (#2431)
• 🛠 test-sources now uses the project directory instead of the package directory (matching the docs). (#2437)
• 🛠 Fixed a bug with GraalPy if vsdevcmd prints an error. Cirrus CI works again. (#2414)
• 🛠 Use the standard Schema line for the integrated JSONSchema. (#2433)
• 📚 Use Python 3.14 color output in docs CLI output. (#2407)

v3.0.0b4

29 May 2025

• 🛠 Dependency updates, including Python 3.14.0b2. (#2371)
• 🛠 Remove the addition of PYTHONSAFEPATH to test-environment. (#2429)
• 📚 README table now matches docs and auto-updates. (#2427, #2428)

v3.0.0b3

28 May 2025

• 🛠 Reverts the test working dir (when test-sources isn't set) to a temporary dir, rather than the project. (#2420)
• 📚 Docs now primarily use the pyproject.toml name of options, rather than the environment variable name. (#2389)

v3.0.0b2

25 May 2025

• ✨ Adds the CIBW_TEST_ENVIRONMENT option, which allows you to set environment variables for the test command. cibuildwheel now sets PYTHONSAFEPATH=1 in test environments by default, to avoid picking up package imports from the local directory - we want to test the installed wheel, not the source tree! You can change that, or any other environment variable in the test environment using this option. (#2388)
• ✨ Improves support for Pyodide builds and adds the CIBW_PYODIDE_VERSION option, which allows you to specify the version of Pyodide to use for builds. (#2002)

v3.0.0b1

19 May 2025

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out!

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option, and changes the working directory for tests.

  • If this option is set, cibuildwheel will copy the files and folders specified in test-sources into a temporary directory, and run the tests from there. This is required for iOS builds, but also useful for other platforms, as it allows you to test the installed wheel without any chance of accidentally importing from the source tree.
  • ~If this option is not set, cibuildwheel will run the tests in the source tree. This is a change from the previous behavior, where cibuildwheel would run the tests from a temporary directory. We're still investigating what's best here, so if you encounter any issues with this, please let us know in issue #2406.~
  • If this option is not set, behaviour matches v2.x - cibuildwheel will run the tests from a temporary directory, and you can use the {project} placeholder in the test-command to refer to the project directory.

• ✨ Added´ dependency-versions inline syntax (#2123)

• 🛠 The default manylinux image has changed from manylinux2014 to manylinux_2_28 (#2330)

• 🛠 Invokes build rather than pip wheel to build wheels by default. You can control this via the build-frontend option. You might notice that you can see your build log output now! (#2321)

• 🛠 Removed the CIBW_PRERELEASE_PYTHONS and CIBW_FREE_THREADED_SUPPORT options - these have been folded into the enable option instead. (#2095)

• 🛠 EOL images manylinux1, manylinux2010, manylinux_2_24 and musllinux_1_1 can no longer be specified by their shortname. The full OCI name can still be used for these images, if you wish (#2316)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• ⚠️ Dropped support for building Python 3.6 and 3.7 wheels. If you need to build wheels for these versions, use cibuildwheel v2.23.3 or earlier. (#2282)

• ⚠️ The minimum Python version required to run cibuildwheel is now Python 3.11. You can still build wheels for Python 3.8 and newer. (#1912)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol. (#2095)

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates (#2280)

Not yet released, but available for testing.

Note - when using a beta version, be sure to check the latest docs, rather than the stable version, which is still on v2.X.

If you've used previous versions of the beta:

• ⚠️ Previous betas of v3.0 changed the working directory for tests. This has been rolled back to the v2.x behaviour, so you might need to change configs if you adapted to the beta 1 or 2 behaviour. See issue #2406 for more information.
• ⚠️ GraalPy shipped with the identifier gp242-* in previous betas, this has been changed to gp311_242-* to be consistent with other interpreters, and to fix a bug with GraalPy and project requires-python detection. If you were using GraalPy, you might need to update your config to use the new identifier.

v3.0.0b4

29 May 2025

• 🛠 Dependency updates, including Python 3.14.0b2 (#2371)
• 🛠 Remove the addition of PYTHONSAFEPATH to test-environment. (#2429)
• 📚 README table now matches docs and auto-updates. (#2427, #2428)

v3.0.0b3

28 May 2025

• 🛠 Reverts the test working dir (when test-sources isn't set) to a temporary dir, rather than the project. (#2420)
• 📚 Docs now primarily use the pyproject.toml name of options, rather than the environment variable name. (#2389)

v3.0.0b2

25 May 2025

• ✨ Adds the CIBW_TEST_ENVIRONMENT option, which allows you to set environment variables for the test command. cibuildwheel now sets PYTHONSAFEPATH=1 in test environments by default, to avoid picking up package imports from the local directory - we want to test the installed wheel, not the source tree! You can change that, or any other environment variable in the test environment using this option. (#2388)
• ✨ Improves support for Pyodide builds and adds the CIBW_PYODIDE_VERSION option, which allows you to specify the version of Pyodide to use for builds. (#2002)

v3.0.0b1

19 May 2025

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out!

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option, and changes the working directory for tests.

  • If this option is set, cibuildwheel will copy the files and folders specified in test-sources into a temporary directory, and run the tests from there. This is required for iOS builds, but also useful for other platforms, as it allows you to test the installed wheel without any chance of accidentally importing from the source tree.
  • ~If this option is not set, cibuildwheel will run the tests in the source tree. This is a change from the previous behavior, where cibuildwheel would run the tests from a temporary directory. We're still investigating what's best here, so if you encounter any issues with this, please let us know in issue #2406.~
  • If this option is not set, behaviour matches v2.x - cibuildwheel will run the tests from a temporary directory, and you can use the {project} placeholder in the test-command to refer to the project directory.

• ✨ Added´ dependency-versions inline syntax (#2123)

• 🛠 The default manylinux image has changed from manylinux2014 to manylinux_2_28 (#2330)

• 🛠 Invokes build rather than pip wheel to build wheels by default. You can control this via the build-frontend option. You might notice that you can see your build log output now! (#2321)

• 🛠 Removed the CIBW_PRERELEASE_PYTHONS and CIBW_FREE_THREADED_SUPPORT options - these have been folded into the enable option instead. (#2095)

• 🛠 EOL images manylinux1, manylinux2010, manylinux_2_24 and musllinux_1_1 can no longer be specified by their shortname. The full OCI name can still be used for these images, if you wish (#2316)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• ⚠️ Dropped support for building Python 3.6 and 3.7 wheels. If you need to build wheels for these versions, use cibuildwheel v2.23.3 or earlier. (#2282)

• ⚠️ The minimum Python version required to run cibuildwheel is now Python 3.11. You can still build wheels for Python 3.8 and newer. (#1912)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol. (#2095)

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates (#2280)

Not yet released, but available for testing.

Note - when using a beta version, be sure to check the latest docs, rather than the stable version, which is still on v2.X.

If you've used previous versions of the beta:

• ⚠️ Previous betas of v3.0 changed the working directory for tests. This has been rolled back to the v2.x behaviour, so you might need to change configs if you adapted to the beta 1 or 2 behaviour. See issue #2406 for more information.
• ⚠️ GraalPy shipped with the identifier gp242-* in previous betas, this has been changed to gp311_242-* to be consistent with other interpreters, and to fix a bug with GraalPy and project requires-python detection. If you were using GraalPy, you might need to update your config to use the new identifier.

v3.0.0b3

28 May 2025

• 🛠 Reverts the test working dir (when test-sources isn't set) to a temporary dir, rather than the project. (#2420)
• 📚 Docs now primarily use the pyproject.toml name of options, rather than the environment variable name. (#2389)

v3.0.0b2

25 May 2025

• ✨ Adds the CIBW_TEST_ENVIRONMENT option, which allows you to set environment variables for the test command. cibuildwheel now sets PYTHONSAFEPATH=1 in test environments by default, to avoid picking up package imports from the local directory - we want to test the installed wheel, not the source tree! You can change that, or any other environment variable in the test environment using this option. (#2388)
• ✨ Improves support for Pyodide builds and adds the CIBW_PYODIDE_VERSION option, which allows you to specify the version of Pyodide to use for builds. (#2002)

v3.0.0b1

19 May 2025

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out!

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option, and changes the working directory for tests.

  • If this option is set, cibuildwheel will copy the files and folders specified in test-sources into a temporary directory, and run the tests from there. This is required for iOS builds, but also useful for other platforms, as it allows you to test the installed wheel without any chance of accidentally importing from the source tree.
  • ~If this option is not set, cibuildwheel will run the tests in the source tree. This is a change from the previous behavior, where cibuildwheel would run the tests from a temporary directory. We're still investigating what's best here, so if you encounter any issues with this, please let us know in issue #2406.~
  • If this option is not set, behaviour matches v2.x - cibuildwheel will run the tests from a temporary directory, and you can use the {project} placeholder in the test-command to refer to the project directory.

• ✨ Added dependency-versions inline syntax (#2123)

• 🛠 EOL manylinux options can no longer be specified by their shortname. Full OCI URL can still be used for these images, if you wish (#2316)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol.

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates (#2280)

Not yet released, but available for testing.

Note - when using a beta version, be sure to check the latest docs, rather than the stable version, which is still on v2.X.

Known issues:

• ⚠️ The CWD for test-command has changed in v3.0, but that is still being debated, it might change before the final release. Please provide feedback on the aforementioned issue if you do (or don't!) encounter issues with this.

v3.0.0b2

25 May 2025

• ✨ Adds the CIBW_TEST_ENVIRONMENT option, which allows you to set environment variables for the test command. cibuildwheel now sets PYTHONSAFEPATH=1 in test environments by default, to avoid picking up package imports from the local directory - we want to test the installed wheel, not the source tree! You can change that, or any other environment variable in the test environment using this option. (#2388)
• ✨ Improves support for Pyodide builds and adds the CIBW_PYODIDE_VERSION option, which allows you to specify the version of Pyodide to use for builds. (#2002)

v3.0.0b1

19 May 2025

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out!

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option, and changes the working directory for tests.

  • If this option is set, cibuildwheel will copy the files and folders specified in test-sources into a temporary directory, and run the tests from there. This is required for iOS builds, but also useful for other platforms, as it allows you to test the installed wheel without any chance of accidentally importing from the source tree.
  • If this option is not set, cibuildwheel will run the tests in the source tree. This is a change from the previous behavior, where cibuildwheel would run the tests from a temporary directory. We're still investigating what's best here, so if you encounter any issues with this, please let us know in issue #2406.

• ✨ Added dependency-versions inline syntax (#2123)

• 🛠 EOL manylinux options can no longer be specified by their shortname. Full OCI URL can still be used for these images, if you wish (#2316)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol.

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates (#2280)

This is a preview of our upcoming v3.0.0 release! Lots of goodies in here!

Note - when using this beta version, be sure to check the latest docs, rather than the stable version, which is still on v2.X.

• 🌟 Adds the ability to build wheels for iOS! Set the platform option to ios on a Mac with the iOS toolchain to try it out!

• 🌟 Adds support for the GraalPy interpreter! Enable for your project using the enable option. (#1538)

• ✨ Adds CPython 3.14 support, under the enable option cpython-prerelease. This version of cibuildwheel uses 3.14.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.14 will be available in cibuildwheel without the flag. (#2390)

• ✨ Adds the test-sources option. [discussion about the test cwd change and how to use to come!]

• ✨ Added dependency-versions inline syntax (#2123)

• 🛠 EOL manylinux options can no longer be specified by their shortname. Full OCI URL can still be used for these images, if you wish (#2316)

• 🛠 Build environments no longer have setuptools and wheel preinstalled. (#2329)

• ⚠️ PyPy wheels no longer built by default, due to a change to our options system. To continue building PyPy wheels, you'll now need to set the enable option to pypy or pypy-eol.

• ⚠️ Dropped official support for Appveyor. If it was working for you before, it will probably continue to do so, but we can't be sure, because our CI doesn't run there anymore. (#2386)

• 📚 A reorganisation of the docs, and numerous updates (#2280)

• 🐛 Fix HTTP 429 errors while downloading virtualenv from GitHub blob URLs – uses a https://bootstrap.pypa.io/ URL instead. (#2775)

• 🛠 Dependency updates, including Python 3.13.3 (#2371)

• 🐛 Workaround an issue with pyodide builds when running cibuildwheel with a Python that was installed via UV (#2328 via #2331)
• 🛠 Dependency updates, including a manylinux update that fixes an 'undefined symbol' error in gcc-toolset (#2334)

• ⚠️ Added warnings when the shorthand values manylinux1, manylinux2010, manylinux_2_24, and musllinux_1_1 are used to specify the images in linux builds. The shorthand to these (unmaintainted) images will be removed in v3.0. If you want to keep using these images, explicitly opt-in using the full image URL, which can be found in this file. (#2312)
• 🛠 Dependency updates, including a manylinux update which fixes an issue with rustup. (#2315)

• ✨ Adds official support for the new GitHub Actions Arm runners. In fact these worked out-of-the-box, now we include them in our tests and example configs. (#2135 via #2281)
• ✨ Adds support for building PyPy 3.11 wheels (#2268 via #2281)
• 🛠 Adopts the beta pypa/manylinux image for armv7l builds (#2269 via #2281)
• 🛠 Dependency updates, including Pyodide 0.27 (#2117 and #2281)

• 🌟 Added a new CIBW_ENABLE/enable feature that replaces CIBW_FREETHREADED_SUPPORT/free-threaded-support and CIBW_PRERELEASE_PYTHONS with a system that supports both. In cibuildwheel 3, this will also include a PyPy setting and the deprecated options will be removed. (#2048)
• 🌟 Dependency groups are now supported for tests. Use CIBW_TEST_GROUPS/test-groups to specify groups in [dependency-groups] for testing. (#2063)
• 🌟 Support for the experimental Ubuntu-based ARMv7l manylinux image (#2052)
• ✨ Show a warning when cibuildwheel is run from Python 3.10 or older; cibuildwheel 3.0 will require Python 3.11 or newer as host (#2050)
• 🐛 Fix issue with stderr interfering with checking the docker version (#2074)
• 🛠 Python 3.9 is now used in CIBW_BEFORE_ALL/before-all on linux, replacing 3.8, which is now EoL (#2043)
• 🛠 Error messages for producing a pure-Python wheel are slightly more informative (#2044)
• 🛠 Better error when uname -m fails on ARM (#2049)
• 🛠 Better error when repair fails and docs for abi3audit on Windows (#2058)
• 🛠 Better error when manylinux-interpreters ensure fails (#2066)
• 🛠 Update Pyodide to 0.26.4, and adapt to the unbundled pyodide-build (now 0.29) (#2090)
• 🛠 Now cibuildwheel uses dependency-groups for development dependencies (#2064, #2085)
• 📚 Docs updates and tidy ups (#2061, #2067, #2072)

• 🛠 Update CPython 3.13 to 3.13.0 final release (#2032)
• 📚 Docs updates and tidy ups (#2035)

• ✨ Adds support for building 32-bit armv7l wheels on musllinux. On a Linux system with emulation set up, set CIBW_ARCHS to armv7l to try it out if you're interested! (#2017)
• 🐛 Fix Linux Podman builds on some systems (#2016)
• ✨ Adds official support for running on Python 3.13 (#2026)
• 🛠 Update CPython 3.13 to 3.13.0rc3 (#2029)

Note: the default manylinux image is scheduled to change from manylinux2014 to manylinux_2_28 in a cibuildwheel release on or after 6th May 2025 - you can set the value now to avoid getting upgraded if you want. (#1992)

• 🐛 Fix a bug in the Linux build, where files copied to the container would have invalid ownership permissions (#2007)
• 🐛 Fix a bug on Windows where cibuildwheel would call upon uv to install dependencies for versions of CPython that it does not support (#2005)
• 🐛 Fix a bug where uv 0.4.10 would not use the right Python when testing on Linux. (#2008)
• 🛠 Bump our documentation pins, fixes an issue with a missing package (#2011)

• ⚠️ Update CPython 3.12 to 3.12.6, which changes the macOS minimum deployment target on CPython 3.12 from macOS 10.9 to macOS 10.13 (#1998)
• 🛠 Changes the behaviour when inheriting config-settings in TOML overrides - rather than extending each key, which is rarely useful, individual keys will override previously set values. (#1803)
• 🛠 Update CPython 3.13 to 3.13.0rc2 (#1998)
• ✨ Adds support for multiarch OCI images (#1961)
• 🐛 Fixes some bugs building Linux wheels on macOS. (#1961)
• ⚠️ Changes the minimum version of Docker/Podman to Docker API version 1.43, Podman API version 3. The only mainstream runner this should affect is Travis Graviton2 runners - if so you can upgrade your version of Docker. (#1961)

• 🌟 CPython 3.13 wheels are now built by default - without the CIBW_PRERELEASE_PYTHONS flag. It's time to build and upload these wheels to PyPI! This release includes CPython 3.13.0rc1, which is guaranteed to be ABI compatible with the final release. Free-threading is still behind a flag/config option. (#1950)
• ✨ Provide a CIBW_ALLOW_EMPTY environment variable as an alternative to the command line flag. (#1937)
• 🐛 Don't use uv on PyPy3.8 on Windows, it stopped working starting in 0.2.25. Note that PyPy 3.8 is EoL. (#1868)
• 🛠 Set the VSCMD_ARG_TGT_ARCH variable based on target arch. (#1876)
• 🛠 Undo cleaner output on pytest 8-8.2 now that 8.3 is out. (#1943)
• 📚 Update examples to use Python 3.12 on host (cibuildwheel will require Python 3.11+ on the host machine starting in October 2024) (#1919)

• 🐛 Update manylinux2014 pins to versions that support past-EoL CentOS 7 mirrors. (#1917)
• 🐛 Support --no-isolation with build[uv] build-frontend. (#1889)
• 🛠 Provide attestations for releases at https://github.com/pypa/cibuildwheel/attestations. (#1916)
• 🛠 Provide CPython 3.13.0b3. (#1913)
• 🛠 Remove some workarounds now that pip 24.1 is available. (#1891, #1892)
• 📚 Remove nosetest from our docs. (#1821)
• 📚 Document the macOS ARM workaround for 3.8 on GHA. (#1871)
• 📚 GitLab CI + macOS is now a supported platform with an example. (#1911)

• 🐛 Don't require setup-python on GHA for Pyodide (#1868)
• 🐛 Specify full python path for uv (fixes issue in 0.2.10 & 0.2.11) (#1881)
• 🛠 Update for pip 24.1b2 on CPython 3.13. (#1879)
• 🛠 Fix a warning in our schema generation script. (#1866)
• 🛠 Cleaner output on pytest 8-8.2. (#1865)

Release post: https://iscinumpy.dev/post/cibuildwheel-2-19-0/

• 🌟 Add a Pyodide platform. Set with --platform pyodide or CIBW_PLATFORM: pyodide on Linux with a host Python 3.12 to build WebAssembly wheels. Not accepted on PyPI currently, but usable directly in a website using Pyodide, for live docs, etc. (#1456, #1859)
• 🌟 Add build[uv] backend, which will take a pre-existing uv install (or install cibuildwheel[uv]) and use uv for all environment setup and installs on Python 3.8+. This is significantly faster in most cases. (#1856)
• ✨ Add free-threaded macOS builds and update CPython to 3.13.0b2. (#1854)
• 🐛 Issue copying a wheel to a non-existent output dir fixed. (#1851, #1862)
• 🐛 Better determinism for the test environment seeding. (#1835)
• 🛠 VIRTUAL_ENV variable now set. (#1842)
• 🛠 Remove a pip<21.3 workaround. (#1842)
• 🛠 Error handling was refactored to use exceptions. (#1719)
• 🛠 Hardcoded paths in tests avoided. (#1834)
• 🛠 Single Python tests made more generic. (#1835)
• 🛠 Sped up our ci by splitting up emulation tests. (#1839)

• 🌟 Add free-threaded Linux and Windows builds for 3.13. New identifiers cp313t-*, new option CIBW_FREE_THREADED_SUPPORT/tool.cibuildwheel.free-threaded-support required to opt-in. See the docs for more information. (#1831)
• ✨ The container-engine is now a build (non-global) option. (#1792)
• 🛠 The build backend for cibuildwheel is now hatchling. (#1297)
• 🛠 Significant improvements and modernization to our noxfile. (#1823)
• 🛠 Use pylint's new GitHub Actions reporter instead of a custom matcher. (#1823)
• 🛠 Unpin virtualenv updates for Python 3.7+ (#1830)
• 🐛 Fix running linux tests from Windows or macOS ARM. (#1788)
• 📚 Fix our documentation build. (#1821)

• ✨ Adds CPython 3.13 support, under the prerelease flag CIBW_PRERELEASE_PYTHONS. This version of cibuildwheel uses 3.13.0b1. Free-threading mode is not available yet (#1657), waiting on official binaries (planned for beta 2) and pip support. While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.13 will be available in cibuildwheel without the flag. (#1815)
• ✨ Musllinux now defaults to musllinux_1_2. You can set the older musllinux_1_1 via config if needed. (#1817)
• 🛠 No longer pre-seed setuptools/wheel in virtual environments (#1819)
• 🛠 Respect the constraints file when building with pip, matching build (#1818)
• 🛠 Use uv to compile our pinned dependencies, 10x faster and doesn't require special setup (#1778)
• 🐛 Fix an issue with the schema (#1788)
• 📚 Document the new delocate error checking macOS versions (#1766)
• 📚 Document Rust builds (#1816)
• 📚 Speed up our readthedocs builds with uv, 26 seconds -> 6 seconds to install dependencies (#1816)

• 🌟 Adds the ability to inherit configuration in TOML overrides. This makes certain configurations much simpler. If you're overriding an option like before-build or environment, and you just want to add an extra command or environment variable, you can just append (or prepend) to the previous config. See the docs for more information. (#1730)
• 🌟 Adds official support for native arm64 macOS GitHub runners. To use them, just specify macos-14 as an os of your job in your workflow file. You can also keep macos-13 in your build matrix to build x86_64. Check out the new GitHub Actions example config.
• ✨ You no longer need to specify --platform to run cibuildwheel locally! Instead it will detect your platform automatically. This was a safety feature, no longer necessary. (#1727)
• 🛠 Removed setuptools and wheel pinned versions. This only affects old-style projects without a pyproject.toml, projects with pyproject.toml are already getting fresh versions of their build-system.requires installed into an isolated environment. (#1725)
• 🛠 Improve how the GitHub Action passes arguments (#1757)
• 🛠 Remove a system-wide install of pipx in the GitHub Action (#1745)
• 🐛 No longer will cibuildwheel override the PIP_CONSTRAINT environment variable when using the build frontend. Instead it will be extended. (#1675)
• 🐛 Fix a bug where building and testing both x86_86 and arm64 wheels on the same runner caused the wrong architectures in the test environment (#1750)
• 🐛 Fix a bug that prevented testing a CPython 3.8 wheel targeting macOS 11+ on x86_64 (#1768)
• 📚 Moved the docs onto the official PyPA domain - they're now available at https://cibuildwheel.pypa.io . (#1775)
• 📚 Docs and examples improvements (#1762, #1734)

• 🐛 Fix an incompatibility with the GitHub Action and new GitHub Runner images for Windows that bundle Powershell 7.3+ (#1741)
• 🛠 Preliminary support for new macos-14 arm64 runners (#1743)

🛠 Update manylinux pins to upgrade from a problematic PyPy version. (#1737)

• 🐛 Fix a bug when building from sdist, where relative paths to files in the package didn't work because the working directory was wrong (#1687)
• 🛠 Adds the ability to disable mounting the host filesystem in containers to /host, through the disable_host_mount suboption on CIBW_CONTAINER_ENGINE.
• 📚 A lot of docs improvements! (#1708, #1705, #1686, #1679, #1667, #1665)

• 🛠 Updates CPython 3.12 version to 3.12.0, final release (#1635)
• ✨ Adds a debug option CIBW_DEBUG_KEEP_CONTAINER to stop cibuildwheel deleting build containers after the build finishes. (#1620)
• 📚 Adds support for [tool.cibuildwheel] checking by adding a schema compatible with the validate-pyproject tool (#1622, #1628, #1629)
• 🐛 Fix parsing of CIBW_CONTAINER_ENGINE and CIBW_BUILD_FRONTEND options to not break arguments on : characters (#1621)
• 🐛 Fix the evaluation order of CIBW_ENVIRONMENT and CIBW_ENVIRONMENT_PASS so that CIBW_ENVIRONMENT assignments can reference environment variables passed through from the host machine. (#1617)
• 🛠 Supports manylinux images' deferred installation of interpreters through the manylinux-interpreters tool (#1630)

• 🛠 Updates the prerelease CPython 3.12 version to 3.12.0rc3 (#1625)
• 🛠 Only calls linux32 in containers when necessary (#1599)

• ✨ Add the ability to pass additional flags to a build frontend through the CIBW_BUILD_FRONTEND option (#1588).
• ✨ The environment variable SOURCE_DATE_EPOCH is now automatically passed through to container Linux builds (useful for reproducible builds!) (#1589)
• 🛠 Updates the prerelease CPython 3.12 version to 3.12.0rc2 (#1604)
• 🐛 Fix requires_python auto-detection from setup.py when the call to setup() is within an if __name__ == "__main__" block (#1613)
• 🐛 Fix a bug that prevented building Linux wheels in Docker on a Windows host (#1573)
• 🐛 --only can now select prerelease-pythons (#1564)
• 📚 Docs & examples updates (#1582, #1593, #1598, #1615)

• 🌟 CPython 3.12 wheels are now built by default - without the CIBW_PRERELEASE_PYTHONS flag. It's time to build and upload these wheels to PyPI! This release includes CPython 3.12.0rc1, which is guaranteed to be ABI compatible with the final release. (#1565)
• ✨ Adds musllinux_1_2 support - this allows packagers to build for musl-based Linux distributions on a more recent Alpine image, and a newer musl libc. (#1561)

• 🛠 Updates the prerelease CPython 3.12 version to 3.12.0b4 (#1550)

• ✨ Adds support for building PyPy 3.10 wheels. (#1525)
• 🛠 Updates the prerelease CPython 3.12 version to 3.12.0b3.
• ✨ Allow the use of the {wheel} placeholder in CIBW_TEST_COMMAND (#1533)
• 📚 Docs & examples updates (#1532, #1416)
• ⚠️ Removed support for running cibuildwheel in Python 3.7. Python 3.7 is EOL. However, cibuildwheel continues to build Python 3.7 wheels for the moment. (#1175)

• 🛠 Updates the prerelease CPython 3.12 version to 3.12.0b2. (#1516)
• 🛠 Adds a moving v<major>.<minor> tag for use in GitHub Actions workflow files. If you use this, you'll get the latest patch release within a minor version. Additionally, Dependabot won't send you PRs for patch releases. (#1517)

• ✨ Adds CPython 3.12 support, under the prerelease flag CIBW_PRERELEASE_PYTHONS. This version of cibuildwheel uses 3.12.0b1.

  While CPython is in beta, the ABI can change, so your wheels might not be compatible with the final release. For this reason, we don't recommend distributing wheels until RC1, at which point 3.12 will be available in cibuildwheel without the flag. (#1507)

• ✨ Adds the ability to pass arguments to the container engine when the container is created, using the CIBW_CONTAINER_ENGINE option. (#1499)

• 🐛 Fix an import error when running on Python 3.7. (#1479)

• 🐛 Fix a bug that caused an extra empty config-setting to be passed to the backend when CIBW_BUILD_FRONTEND is set to build. (#1474)
• 🐛 Fix a crash that occurred when overwriting an existing wheel on Windows. (#1464)
• 🛠 Pinned version updates, including CPython 3.10.11, 3.11.3, pip 23.1 and wheel 0.40.0.

• 🐛 Fix a bug that prevented the use of CIBW_CONFIG_SETTINGS with the 'pip' build backend. (#1430)

• ✨ Adds support for PyPy arm64 wheels. This means that you can build PyPy wheels for Apple Silicon machines. Cross-compilation is not supported for these wheels, so you'll have to build on an Apple Silicon machine. (#1372)
• 🛠 Pinned version updates, including PyPy to v7.3.11 and setuptools to 66.0.0.