Ah it was indeed just that!

I'm now on:

$ llama --version version: 8770 (82764d8) built with GNU 15.2.0 for Linux x86_64

(From Nix unstable)

And this works as advertised, nice chat interface, but no openai API I guess, so no opencode...

check on same port, there is an OpenAI API https://github.com/ggml-org/llama.cpp/tree/master/tools/serv...