khelpcenter: use kdeWrapper

pkgs/desktops/kde-5/applications/khelpcenter.nix

@@ -1,17 +1,19 @@
 {
-  kdeApp, ecm, kdoctools, makeQtWrapper,
+  kdeApp, kdeWrapper,
+  ecm, kdoctools,
   grantlee, kconfig, kcoreaddons, kdbusaddons, ki18n, kinit, kcmutils,
   kdelibs4support, khtml, kservice, xapian
 }:
 
-kdeApp {
-  name = "khelpcenter";
-  nativeBuildInputs = [ ecm kdoctools makeQtWrapper ];
-  buildInputs = [
-    grantlee kdelibs4support khtml ki18n kconfig kcoreaddons kdbusaddons kinit
-    kcmutils kservice xapian
-  ];
-  postInstall = ''
-    wrapQtProgram "$out/bin/khelpcenter"
-  '';
-}
+let
+  unwrapped =
+    kdeApp {
+      name = "khelpcenter";
+      nativeBuildInputs = [ ecm kdoctools ];
+      buildInputs = [
+        grantlee kdelibs4support khtml ki18n kconfig kcoreaddons kdbusaddons
+        kinit kcmutils kservice xapian
+      ];
+    };
+in
+kdeWrapper unwrapped { targets = [ "bin/khelpcenter" ]; }