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Prerequisites

The following tools are required to build ITK Python wheels locally.

All Platforms

Pixi is the primary build environment manager. It automatically provisions the correct Python version, compiler toolchain, CMake, Ninja, and all other build dependencies for each target platform. Manual installation of compilers or CMake is not required when using Pixi.

Install Pixi:

# Linux or macOS
curl -fsSL https://pixi.sh/install.sh | bash

# Windows (PowerShell)
powershell -ExecutionPolicy Bypass -c "irm -useb https://pixi.sh/install.ps1 | iex"

You will also need Git 2.x or later.

Linux

Portable manylinux builds require Docker (or an OCI-compatible runtime such as Podman or nerdctl) to run the manylinux container environment.

Install Docker by following the official Docker Engine installation guide.

macOS

No additional tools are required beyond Pixi. The Pixi macosx-build environment provides the Clang 1.10.0 compiler toolchain and the delocate wheel repair utility.

Windows

Microsoft Visual Studio 2022 (or the Build Tools for Visual Studio 2022) with the Desktop development with C++ workload is required.

Note

Pixi environments provision Python, CMake, Ninja, and build helpers (auditwheel on Linux, delocate on macOS, delvewheel on Windows) automatically. Only Docker (Linux) and MSVC (Windows) require separate installation.