From d6ad9ce105f453ead89d65370a1bb4a3ff3180dd Mon Sep 17 00:00:00 2001
From: Silvan Mosberger <contact@infinisil.com>
Date: Sun, 12 Jan 2020 16:53:27 +0100
Subject: [PATCH] nixos/usbmuxd: Fix users.groups assignment

A mistake was introduced in https://github.com/NixOS/nixpkgs/pull/63103
---
 nixos/modules/services/hardware/usbmuxd.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/services/hardware/usbmuxd.nix b/nixos/modules/services/hardware/usbmuxd.nix
index 50b931dcb487..11a4b0a858f9 100644
--- a/nixos/modules/services/hardware/usbmuxd.nix
+++ b/nixos/modules/services/hardware/usbmuxd.nix
@@ -51,7 +51,7 @@ in
       };
     };
 
-    users.groups = optional (cfg.group == defaultUserGroup) {
+    users.groups = optionalAttrs (cfg.group == defaultUserGroup) {
       ${cfg.group} = { };
     };