puter/classes/headful/fs.nix

{
  boot.initrd.luks.devices.main.device = "/dev/disk/by-label/cryptmain";

  fileSystems = {
    "/" = {
      fsType = "ext4";
      device = "/dev/mapper/main";
      options = ["noatime"];
    };
    "/boot" = {
      label = "BOOT";
      fsType = "vfat";
    };
  };
}