1{den, ...}: {
 2  den.hosts.hyacine.settings = {
 3    disk.btrfs-disko = {
 4      deviceId = "/dev/vda";
 5    };
 6  };
 7
 8  den.aspects.hyacine = {
 9    includes = [den.aspects.disk.btrfs-disko];
10  };
11}