Update all machines to use new roles format

machines/boxy/configuration.nix

@@ -2,18 +2,23 @@
 # your system. Help is available in the configuration.nix(5) man page, on
 # https://search.nixos.org/options and in the NixOS manual (`nixos-help`).
 
-{ config, lib, pkgs, ... }:
+{ ... }:
 
 {
   imports =
     [ # Include the results of the hardware scan.
       ./hardware-configuration.nix
-      ../../roles/common/default.nix
-      ../../roles/nix/default.nix
-      (import ../../roles/kodi/default.nix { autologin = true; wayland = true; inherit lib; inherit pkgs; })
-      (import ../../roles/users/default.nix { extraGroups = []; })
     ];
 
+  roles = {
+    kodi = {
+      enable = true;
+      autologin = true;
+      wayland = true;
+    };
+    users.enable = true;
+  };
+
   # Use the systemd-boot EFI boot loader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;