Python wheels are great. Building them across Mac, Linux, Windows, on multiple versions of Python, is not.

cibuildwheel is here to help. cibuildwheel runs on your CI server - currently it supports GitHub Actions, Azure Pipelines, Travis CI, AppVeyor, CircleCI, and GitLab CI - and it builds and tests your wheels across all of your platforms.

What does it do?

macOS Intel macOS Apple Silicon Windows 64bit Windows 32bit Windows Arm64 manylinux
musllinux x86_64
musllinux i686
musllinux aarch64
musllinux ppc64le
musllinux s390x
CPython 3.6 N/A N/A
CPython 3.7 N/A N/A
CPython 3.8 N/A
CPython 3.9 ✅² ✅³
CPython 3.10 ✅²
CPython 3.11⁴ ✅²
PyPy 3.7 v7.3 N/A N/A N/A ✅¹ ✅¹ ✅¹ N/A N/A
PyPy 3.8 v7.3 N/A N/A N/A ✅¹ ✅¹ ✅¹ N/A N/A
PyPy 3.9 v7.3 N/A N/A N/A ✅¹ ✅¹ ✅¹ N/A N/A

¹ PyPy is only supported for manylinux wheels.
² Windows arm64 support is experimental.
³ Alpine 3.14 and very briefly 3.15's default python3 was not able to load musllinux wheels. This has been fixed; please upgrade the python package if using Alpine from before the fix.
⁴ CPython 3.11 is available using the CIBW_PRERELEASE_PYTHONS option.

  • Builds manylinux, musllinux, macOS 10.9+, and Windows wheels for CPython and PyPy
  • Works on GitHub Actions, Azure Pipelines, Travis CI, AppVeyor, CircleCI, and GitLab CI
  • Bundles shared library dependencies on Linux and macOS through auditwheel and delocate
  • Runs your library's tests against the wheel-installed version of your library

See the cibuildwheel 1 documentation if you need to build unsupported versions of Python, such as Python 2.


cibuildwheel runs inside a CI service. Supported platforms depend on which service you're using:

Linux macOS Windows Linux ARM
GitHub Actions ✅¹
Azure Pipelines
Travis CI
Gitlab CI

¹ Requires emulation, distributed separately. Other services may also support Linux ARM through emulation or third-party build hosts, but these are not tested in our CI.

To get started, head over to the setup guide.

How it works

This diagram summarises the steps that cibuildwheel takes on each platform to build your package's wheels.

Manylinux Docker container
Test virtualenv
For each version of Python
If tests are configured

This isn't exhaustive, for a full list of the things cibuildwheel can do, check the options page.