Announcement: Windows msys2 mingw64 snapshot will be frozen #967

This change impacts setup-ruby with ruby version >= 2.4, < 3.1 on Windows. The impacted ruby versions will continue to work as is without receiving updates. If you're having issue with these versions, make sure you update setup-ruby to v1.338.0 or later.

If you're using an impacted version and installing additional msys2 mingw64 packages either by using ruby/setup-ruby-pkgs or manually, please consider upgrading to ruby >= 3.1, or making a backup of your additional msys2 packages if you need them.

As part of ruby/setup-ruby, we maintain the project ruby/setup-msys2-gcc that creates snapshots of msys2 with packages required by ruby preinstalled to speed up the setup for users.

On 2026/03/25, msys2 mingw64 was deprecated, and as of 2026/10/24 some critical packages are now getting removed. Therefore, we're freezing our msys2 mingw64 snapshot to the last working one created on 2026/10/24. Moving forward, our msys2 mingw64 snapshot will not receive any updates.