diff --git a/nixos/modules/services/x11/desktop-managers/xfce4-14.nix b/nixos/modules/services/x11/desktop-managers/xfce4-14.nix
index 57d1268d655..ae7ee322c64 100644
--- a/nixos/modules/services/x11/desktop-managers/xfce4-14.nix
+++ b/nixos/modules/services/x11/desktop-managers/xfce4-14.nix
@@ -69,7 +69,6 @@ in
 
       exo
       garcon
-      gtk-xfce-engine
       libxfce4ui
       xfconf
 
diff --git a/pkgs/desktops/xfce4-14/default.nix b/pkgs/desktops/xfce4-14/default.nix
index 294dfa92c79..0e2c8c1696b 100644
--- a/pkgs/desktops/xfce4-14/default.nix
+++ b/pkgs/desktops/xfce4-14/default.nix
@@ -93,8 +93,6 @@ makeScope newScope (self: with self; {
 
   ## COMMON PARTS WITH XFCE 4.12
 
-  gtk-xfce-engine = callPackage ../xfce/core/gtk-xfce-engine.nix { withGtk3 = false; };
-
   xfce4-icon-theme = callPackage ../xfce/art/xfce4-icon-theme.nix { };
 
   xfwm4-themes = callPackage ../xfce/art/xfwm4-themes.nix { };
@@ -113,7 +111,6 @@ makeScope newScope (self: with self; {
 
 
   ## ALIASES
-
-  # added 2019-08-18
-  xfce4-mixer = throw "deprecated 2019-08-18: obsoleted by xfce4-pulseaudio-plugin";
+  xfce4-mixer = throw "deprecated 2019-08-18: obsoleted by xfce4-pulseaudio-plugin"; # added 2019-08-18
+  gtk-xfce-engine = throw "deprecated 2019-09-17: Xfce 4.14 deprecated gtk-xfce-engine"; # added 2019-09-17
 })