diff --git a/modules/home-manager/default.nix b/modules/home-manager/default.nix
index 0967ef4..da2b766 100644
--- a/modules/home-manager/default.nix
+++ b/modules/home-manager/default.nix
@@ -1 +1,2 @@
+_:
 {}
diff --git a/system/hardware/sound.nix b/system/hardware/sound.nix
index ab264bd..1e8b92f 100644
--- a/system/hardware/sound.nix
+++ b/system/hardware/sound.nix
@@ -1,7 +1,7 @@
 { config, lib, pkgs, ...}:
 let
   cfg = config.nixfiles.hardware.sound;
-  inherit (lib) mkEnableOption mkIf mkDefault;
+  inherit (lib) optionals mkEnableOption mkIf mkDefault;
 in
 {
   # Enable sound.