yakuake: fix build

+2
+2
pkgs/applications/misc/yakuake/default.nix
··· 15 15 , konsole 16 16 , kparts 17 17 , kwindowsystem 18 + , qtx11extras 18 19 }: 19 20 20 21 let ··· 39 40 knotifyconfig 40 41 kparts 41 42 kwindowsystem 43 + qtx11extras 42 44 ]; 43 45 44 46 propagatedBuildInputs = [