Getting more idomatic nix modules setup... will tackle users dir later

modules/tty_caps_esc.nix

@@ -0,0 +1,28 @@
+{
+  config,
+  lib,
+  pkgs,
+  settings,
+  ...
+}:
+with lib;
+let
+  name = "tty_caps_esc";
+  cfg = config.mods.${name};
+in
+{
+  options = {
+    mods.${name} = {
+      enable = mkEnableOption (lib.mdDoc "Enable ${name}");
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.xserver.xkb.options = "caps:escape";
+    console = {
+      earlySetup = true;
+      packages = with pkgs; [ terminus_font ];
+      useXkbConfig = true; # use xkb.options in tty. (caps -> escape)
+    };
+  };
+}