Hello, here is a popular Doom 2 source port that is required for manymodern doom maps and mods. It should be testable with `guix environment --ad-hoc freedoom gzdoom --gzdoom`. I tested it with freedoom and everything seems to work fine. The midi devices "wildmidi" and "gus" are silent for me, but that isalso the case on the official .deb release for Ubuntu, I don't know whatis up with them, but I assume its okay. All the other midi outputsshould work.