Collabora has published a blog post about its work with Valve on Holo Core, which is a port of Arch Linux to aarch64 to be used as the the operating system on Valve's 64-bit Arm Steam Frame gaming system. Collabora has released the sources, binary packages, and a container image for aarch64 devices. The post describes some of the challenges in porting Arch Linux to a new architecture, and what remains to be done: Whilst the infrastructure developed to this point is capable of building from first principles up until a point-in-time snapshot, the next step is to build this into a system which can track Arch Linux as it is developed. This work will serve as the basis of a continuously-operating CI system capable of shadowing Arch Linux itself. We will work with the upstream Arch Linux project to help Arch with their efforts to port the distribution to aarch64 architecture and work towards automated repeatable builds. The post also includes instructions on how to create and test an aarch64