Version 4.2.1-2 is maintenance release; it adds the cp.exe binary.

This is the xPack distribution of Windows Build Tools (formerly part of the GNU MCU/ARM Eclipse project).

There are separate binaries for Windows, 32/64-bit.


The binary files are available from GitHub releases.


The full details of installing the xPack Windows Build Tools on various platforms are presented in the separate Install page.

Easy install

The easiest way to install Windows Build Tools is with xpm by using the binary xPack, available as @xpack-dev-tools/windows-build-tools from the registry.

To install the latest version available, use:

xpm install --global @xpack-dev-tools/windows-build-tools@latest --verbose

To install this specific version, use:

xpm install --global @xpack-dev-tools/windows-build-tools@4.2.1-2-1


The xPack Windows Build Tools uses programs from other projects.

The current version is based on:


There are no functional changes from original projects..

Bug fixes

  • none


Known problems

  • none


  • none

Supported platforms

Only binaries for Windows are provided.

The binaries were built using the xPack Build Box (XBB), a set of build environments based on slightly older distributions, that should be compatible with most recent systems.

  • Windows: all binaries were built with mingw-w64 GCC 9.3, running in an Ubuntu 12 Docker container


The scripts used to build this distribution are in:

  • distro-info/scripts

For the prerequisites and more details on the build procedure, please see the README-MAINTAINER page.

Travis tests

  • none


The binaries were testes on Windows 10 Pro 32/64-bit.

The tests consist in running Eclipse builds.

In all cases, install the archive in Downloads and configure the path in Eclipse.


The SHA-256 hashes for the files are:



Download analytics

Credit to Shields IO for the badges and to Somsubhra/github-release-stats for the individual file counters.