{ ... }: {
  fileSystems = {
    "/" =     { label = "root"; };
    "/boot" = { label = "BOOT"; };
    "/home" = { label = "home"; };
  };

  boot.initrd.luks.devices = {
    luks-system = {
      device = "/dev/disk/by-uuid/b51ac469-a88d-4cc8-9b92-d0f0c8479eb2";
      preLVM = true;
      allowDiscards = true;
    };
  };
}