Getting Quake Brutalist Jam III running on Linux using Quake from my Steam library took a bit of research.
./ironwail -game qbj3
Edit: Changing /Id1 to /id1 and making the *.pak files lowercase will allowed the MOD to launch correctly on my Debian system using ironwail-0.8.1.
it hit me too and I ended up having to put the qbj3 directory in my steam directory. Apparently with ironwail 0.8 it looks there.
I think I like this approach more though so i'll try it
Is it? I hadn't used Ironwail before, but I just installed it somewhere (as per the instructions) and it found the Quake dir from Steam (where I extracted qbj3 as well) all by itself. I used VkQuake before this.