diff --git a/pkgs/desktops/plasma-5/plasma-workspace/default.nix b/pkgs/desktops/plasma-5/plasma-workspace/default.nix
index 2c4287f8edf7..8df146068cf2 100644
--- a/pkgs/desktops/plasma-5/plasma-workspace/default.nix
+++ b/pkgs/desktops/plasma-5/plasma-workspace/default.nix
@@ -48,6 +48,11 @@ mkDerivation {
     ./0002-absolute-wallpaper-install-dir.patch
   ];
 
+  postPatch = ''
+    substituteInPlace wallpapers/image/wallpaper.knsrc.cmake \
+      --replace '@QtBinariesDir@/qdbus' ${getBin qttools}/bin/qdbus
+  '';
+
   NIX_CFLAGS_COMPILE = [
     ''-DNIXPKGS_XMESSAGE="${getBin xmessage}/bin/xmessage"''
     ''-DNIXPKGS_XRDB="${getBin xrdb}/bin/xrdb"''