nixos/services.ivpn: remove with lib;

nixos/modules/services/networking/ivpn.nix

@@ -2,11 +2,10 @@
 let
   cfg = config.services.ivpn;
 in
-with lib;
 {
   options.services.ivpn = {
-    enable = mkOption {
-      type = types.bool;
+    enable = lib.mkOption {
+      type = lib.types.bool;
       default = false;
       description = ''
         This option enables iVPN daemon.
@@ -15,7 +14,7 @@ with lib;
     };
   };
 
-  config = mkIf cfg.enable {
+  config = lib.mkIf cfg.enable {
     boot.kernelModules = [ "tun" ];
 
     environment.systemPackages = with pkgs; [ ivpn ivpn-service ];
@@ -47,5 +46,5 @@ with lib;
     };
   };
 
-  meta.maintainers = with maintainers; [ ataraxiasjel ];
+  meta.maintainers = with lib.maintainers; [ ataraxiasjel ];
 }