First attempt at splitting out common config items

common.nix

@@ -0,0 +1,17 @@
+{ config, lib, pkgs, ... }:
+
+{
+    imports = [
+        users.nix
+    ];
+
+    # Set your time zone.
+    time.timeZone = "Europe/London";
+
+    # Select internationalisation properties.
+    i18n.defaultLocale = "en_GB.UTF-8";
+    console = {
+        font = "Lat2-Terminus16";
+        useXkbConfig = true; # use xkb.options in tty.
+    };
+}