This guide is deprecated! Please take a look at the defacto un-official SteamOS project HoloISO.
HoloISO is more straightforward to install and is being actively worked on.
Running Steams Deck UI on Manjaro with Minimal Glitches
This is an unofficial short guide on running Steam Decks new UI on Manjaro. I am kind of a linux noob, so forgive me if I get a few things wrong in this guide. Also, I have not fully tested everything so there may be some weird issues that I have overlooked.