plasma

modules/nixos/system/default.nix

@@ -1,55 +1,68 @@
-{ pkgs, system, ... }:
+{
+  config,
+  lib,
+  namespace,
+  pkgs,
+  system,
+  ...
+}:
 let
-  timezone = "America/Chicago";
+  inherit (lib.${namespace}) mkOpt;
+  cfg = config.${namespace}.system;
   isArm = system == "aarch64-linux";
 in
 {
+  options.${namespace}.system = {
+    timezone = mkOpt lib.types.str "America/Chicago" "System timezone (e.g. \"America/New_York\").";
 
-  environment.systemPackages =
-    with pkgs;
-    [
-      brightnessctl
-      dconf
-      disko
-      kdiskmark
-      nil
-      nix-output-monitor
-      nixos-anywhere
-      qemu
-      udisks2
-      unzip
-    ]
-    ++ (
-      if isArm then
-        [ ]
-      else
-        [
-          acpilight
-          aha
-          aspell
-          aspellDicts.en
-          aspellDicts.en-computers
-          aspellDicts.en-science
-          ddcui
-          ddcutil
-          ddccontrol
-          ddccontrol-db
-          efibootmgr
-          memtest86-efi
-          memtest86plus
-          os-prober
-          sbctl
-          tpm2-tools
-          tpm2-tss
-          winetricks
-        ]
-    );
-
-  # Time config
-  time = {
-    # Set your time zone.
-    timeZone = timezone;
+    stateVersion =
+      mkOpt lib.types.str "23.11"
+        "NixOS state version. Should match the version in use when the system was first installed.";
   };
 
-  system.stateVersion = "23.11";
+  config = {
+    environment.systemPackages =
+      with pkgs;
+      [
+        brightnessctl
+        dconf
+        disko
+        kdiskmark
+        nil
+        nix-output-monitor
+        nixos-anywhere
+        qemu
+        udisks2
+        unzip
+      ]
+      ++ (
+        if isArm then
+          [ ]
+        else
+          [
+            acpilight
+            aha
+            aspell
+            aspellDicts.en
+            aspellDicts.en-computers
+            aspellDicts.en-science
+            ddcui
+            ddcutil
+            ddccontrol
+            ddccontrol-db
+            efibootmgr
+            memtest86-efi
+            memtest86plus
+            os-prober
+            sbctl
+            tpm2-tools
+            tpm2-tss
+            winetricks
+          ]
+      );
+
+    time.timeZone = cfg.timezone;
+
+    system.stateVersion = cfg.stateVersion;
+  };
 }