seperated out some options into generic graphical config.

configs/nixos/keyd.nix

@@ -0,0 +1,23 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: {
+  services.keyd = {
+    enable = true;
+    keyboards.default = {
+      ids = ["*"];
+      settings = {
+        capslock = "overload(control, esc)";
+      };
+    };
+  };
+  environment.etc."libinput/local-overrides.quirks".text = ''
+    [Serial Keyboards]
+
+    MatchUdevType=keyboard
+    MatchName=keyd*keyboard
+    AttrKeyboardIntegration=internal
+  '';
+}