Thanks for your response.

That’s exactly what i had in mind. I just wasn’t quite sure it would work out as i imagined.

Since i asked this question i have already prepared a second (empty) disk and a disko config to make it all declarative. Before i actually apply this config to my second disk i’m looking into creating a VM to test the disko-partitions

Home-manager is probably what you want.

There are also some flakes (search in the official nixos search in the flakes tab) maybe one of them provides a module you need