Odin needs too recent LLVM versions to work. A pity this Reticulum client it's written on that, because if it were written in Go it would be instantly portable to legacy machines:

https://github.com/Quad4-Software/Ren-TUI

Reticulum in Go:

https://github.com/Quad4-Software/Reticulum-Go

On Odin itself, it looks really simple, and I'd love it if it were self-bootstrapable or compilable with just a C99 compiler like cparser, cproc or TCC.