refactor

modules/nixos/system/xkb/default.nix

@@ -0,0 +1,19 @@
+{ options, config, lib, ... }:
+
+with lib;
+with lib.plusultra;
+let cfg = config.plusultra.system.xkb;
+in
+{
+  options.plusultra.system.xkb = with types; {
+    enable = mkBoolOpt false "Whether or not to configure xkb.";
+  };
+
+  config = mkIf cfg.enable {
+    console.useXkbConfig = true;
+    services.xserver = {
+      layout = "us";
+      xkbOptions = "caps:escape";
+    };
+  };
+}