It’s slightly more complicated 🙂
There are a number of issues with NoMachine on Arch-based distros which we have currently queued up for investigation. We will update this topic soon.
NoMachine work perfectly on all of them when on any other based distro (Debian, redhat,etc..) or Windows.
Debian, Red Hat, Fedora, Ubuntu, Suse are those distros we officially support so NoMachine must work out-of-the box 🙂 To be honest, Arch is not in the list of officially supported distros. There are so many Linux distributions and desktop variations for any possible Linux distribution that, even if we were willing to support them all, it would be an impossible task.