[19:58] <arraybolt3> Eickmeyer: Hey, I just now remembered something that you may find important. One of the packages seeded in Ubuntu Studio, discodos, ships a binary, /usr/bin/disco (I believe). This binary is *also* shipped by one of the Mono packages (which get installed if you do "sudo apt install mono-complete"), not sure which package exactly. So discodos and Mono conflict. I've run into this a couple of times and ended up having to 
[19:58] <arraybolt3> untangle the package manager afterwards, so you may want to add a "Conflicts:" in there if you manage that package (which I suspect you do). Maybe also have someone add a "Conflicts:" line in the Mono package, too.
[20:04] <krytarik> Turns out it's mono-devel
[22:23] <Eickmeyer> arraybolt3: I don't manage that package. You'll see by the versioning that it's completely upstream Debian.
[22:24] <arraybolt3> Eickmeyer: Ah. OK.
[22:31]  * Eickmeyer wonders who even uses discodos anymore...