{
  config,
  lib,
  pkgs,
  ...
}:
let
  inherit (lib)
    mkMerge
    mkOption
    optionalAttrs
    types
    ;

  boot = "cb03cf78-715e-4030-ba82-189ff8897eaf";
  esp = "4E4C-1139";
  luks = "0cf52ea1-16d1-4dec-a69a-bdac82bbcf25";
  cryptroot = "6fb9ce3c-c870-4eb7-8199-6536ff898701";
in
{
  config = mkMerge [
    {
      fileSystems."/boot" = {
        device = "/dev/disk/by-uuid/${boot}";
        fsType = "ext4";
      };

      fileSystems."/efi" = {
        device = "/dev/disk/by-uuid/${esp}";
        fsType = "vfat";
        options = [
          "fmask=0137"
          "dmask=0027"
        ];
      };

      fileSystems."/" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@root" ];
      };

      fileSystems."/home" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@home" ];
      };

      fileSystems."/nix" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@nix" ];
      };

      fileSystems."/var/cache" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@var_cache" ];
      };

      fileSystems."/var/log" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@var_log" ];
      };

      fileSystems."/var/spool" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@var_spool" ];
      };

      fileSystems."/var/tmp" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@var_tmp" ];
      };

      fileSystems."/var/lib/machines" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@var_lib_machines" ];
      };

      fileSystems."/var/lib/portables" = {
        device = "/dev/disk/by-uuid/${cryptroot}";
        fsType = "btrfs";
        options = [ "subvol=@var_lib_portables" ];
      };

      swapDevices = [ ];
    }
  ];
}