Valve will finally let you build your own Steam Machine with SteamOS for desktop

If you don't get lucky with Valve's Steam Machine reservation system, you can make your own Steam Machine instead. Valve says that "starting with the SteamOS 3.8 release, you can put together your own Steam Machine using whatever PC parts you want." SteamOS 3.8.10 launched last week with a slew of updates, including "improved compatibility with recent Intel and AMD platforms." Alongside that improved compatibility, Valve is giving gamers the green light to install SteamOS on their own desktops.