add enable function

hosts/othalan/default.nix

@@ -1,18 +1,17 @@
 {
   pkgs,
   self,
+  lib,
   ...
-}: {
+}: let
+  inherit (lib) enabled;
+in {
   imports = with self.nixosModules; [
-    nix-ld
     restic
     docker
   ];
 
   oizys = {
-    vbox.enable = true;
-    desktop.enable = true;
-    vpn.enable = true;
     languages = [
       "misc"
       "python"
@@ -20,7 +19,11 @@
       "tex"
       "node"
     ];
-    chrome.enable = true;
+    nix-ld = enabled;
+    vbox = enabled;
+    desktop = enabled;
+    vpn = enabled;
+    chrome = enabled;
   };
 
   environment.systemPackages = with pkgs; [

lib/extended.nix

@@ -2,6 +2,8 @@ final: prev: let
   inherit (final) hasSuffix;
   runes = import ../modules/runes;
 in {
+  enabled = {enable = true;};
+  disabled = {enable = false;};
   isNixFile = path: hasSuffix ".nix" path;
   mkIfIn = name: list: prev.mkIf (builtins.elem name list);
   mkRune = {

modules/common.nix

@@ -28,6 +28,8 @@
     # programs
     chrome
     vscode
+
+    nix-ld
   ];
 
   options.oizys.desktop.enable = lib.mkEnableOption "is desktop";

modules/nix-ld.nix

@@ -1,4 +1,14 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}: let
+  inherit (lib) mkEnableOption mkIf;
+  cfg = config.oizys.nix-ld;
+in {
+  options.oizys.nix-ld.enable = mkEnableOption "enable nix-ld support";
+  config = mkIf cfg.enable {
     programs.nix-ld.enable = true;
 
     # Packages that need at least something in this list:
@@ -56,4 +66,5 @@
       xorg.libxshmfence
       zlib
     ];
+  };
 }