diff --git a/pkgs/desktops/xfce/applications/xfce4-taskmanager/default.nix b/pkgs/desktops/xfce/applications/xfce4-taskmanager/default.nix
index 9a923025c94d..fd59b173a732 100644
--- a/pkgs/desktops/xfce/applications/xfce4-taskmanager/default.nix
+++ b/pkgs/desktops/xfce/applications/xfce4-taskmanager/default.nix
@@ -1,4 +1,4 @@
-{ lib, mkXfceDerivation, exo, gtk3, libwnck3, libXmu }:
+{ mkXfceDerivation, exo, gtk3, libwnck3, libXmu }:
 
 mkXfceDerivation {
   category = "apps";