diff --git a/pkgs/desktops/xfce/default.nix b/pkgs/desktops/xfce/default.nix
index bceed06aff11..18df33389d05 100644
--- a/pkgs/desktops/xfce/default.nix
+++ b/pkgs/desktops/xfce/default.nix
@@ -15,10 +15,6 @@ makeScopeWithSplicing' {
       inherit (self) callPackage;
     in
     {
-      #### NixOS support
-
-      genericUpdater = pkgs.genericUpdater;
-
       #### CORE
 
       exo = callPackage ./core/exo { };
@@ -167,6 +163,8 @@ makeScopeWithSplicing' {
 
       automakeAddFlags = throw "xfce.automakeAddFlags has been removed: this setup-hook is no longer used in Nixpkgs"; # added 2024-03-24
 
+      genericUpdater = throw "xfce.genericUpdater has been removed: use pkgs.genericUpdater directly"; # added 2025-12-22
+
       mkXfceDerivation = lib.warnOnInstantiate ''
         xfce.mkXfceDerivation has been deprecated, please use stdenv.mkDerivation
         directly. You can migrate by adding `pkg-config`, `xfce4-dev-tools`, and