Add a global options role.

nix/configuration/configuration.nix

@@ -9,6 +9,7 @@
 {
   imports = [
     ./roles/reset
+    ./roles/global_options
     ./util/unfree_polyfill
     ./roles/iso
     "${

nix/configuration/roles/global_options/default.nix

@@ -0,0 +1,34 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  options.me = {
+
+  };
+
+  # options.me.graphicsCardType = lib.mkOption {
+  #   type = lib.types.nullOr (
+  #     lib.types.enum [
+  #       "amd"
+  #       "intel"
+  #       "nvidia"
+  #     ]
+  #   );
+  #   default = null;
+  #   example = "amd";
+  #   description = "What graphics card type is in the computer.";
+  # };
+
+  # options.me.graphical = lib.mkOption {
+  #   type = lib.types.bool;
+  #   default = false;
+  #   example = true;
+  #   description = "Whether we want to install graphical programs.";
+  # };
+}