No idea where to begin. (Compiling mumble server from scratch)

I’ve had this running nicely on my x86_64 libreelec box but due to an audio failure on the bedroom tv, we’ve had to rearrange boxes/tv’s. My s912 is now the lounge device and is cabled directly to the router rather than wifi.

I know there’s a raspbian package available as well as Ubuntu for pi, so I know it can run on arm.

Any pointers of where to go next would be appreciated