start to split nix into modules

modules/system/doas.nix

@@ -0,0 +1,28 @@
+# Replace sudo with doas
+
+{ config, ... }: {
+
+  config = {
+    security = {
+
+      # Remove sudo
+      sudo.enable = false;
+
+      # Add doas
+      doas = {
+        enable = true;
+
+        # No password required
+        wheelNeedsPassword = false;
+
+        # Pass environment variables from user to root
+        # Also requires removing password here
+        extraRules = [{
+          groups = [ "wheel" ];
+          noPass = true;
+          keepEnv = true;
+        }];
+      };
+    };
+  };
+}

modules/system/timezone.nix

@@ -0,0 +1,14 @@
+{ config, ... }:
+
+{
+  config = {
+
+    # Service to determine location for time zone
+    services.geoclue2.enable = true;
+    location = { provider = "geoclue2"; };
+
+    # Enable local time based on time zone
+    services.localtime.enable = true;
+
+  };
+}