wrapQtAppsHook: Remove ad hoc Qt wrappers

pkgs/applications/misc/xpdf/default.nix

@@ -1,6 +1,6 @@
 { enableGUI ? true, enablePDFtoPPM ? true, useT1Lib ? false
 , stdenv, fetchurl, zlib, libpng, freetype ? null, t1lib ? null
-, cmake, qtbase ? null, qtsvg ? null, makeWrapper
+, cmake, qtbase ? null, qtsvg ? null, wrapQtAppsHook
 }:
 
 assert enableGUI -> qtbase != null && qtsvg != null && freetype != null;
@@ -22,7 +22,9 @@ stdenv.mkDerivation {
   # https://cmake.org/cmake/help/v3.10/command/cmake_minimum_required.html
   patches = stdenv.lib.optional stdenv.isDarwin  ./cmake_version.patch;
 
-  nativeBuildInputs = [ cmake makeWrapper ];
+  nativeBuildInputs =
+    [ cmake ]
+    ++ stdenv.lib.optional enableGUI wrapQtAppsHook;
 
   cmakeFlags = ["-DSYSTEM_XPDFRC=/etc/xpdfrc" "-DA4_PAPER=ON"];
 
@@ -36,11 +38,6 @@ stdenv.mkDerivation {
 
   hardeningDisable = [ "format" ];
 
-  postInstall = stdenv.lib.optionalString (stdenv.isDarwin && enableGUI) ''
-    wrapProgram $out/bin/xpdf \
-      --set QT_PLUGIN_PATH ${qtbase.bin}/${qtbase.qtPluginPrefix}:${qtsvg.bin}/${qtbase.qtPluginPrefix}
-  '';
-
   meta = with stdenv.lib; {
     homepage = https://www.xpdfreader.com;
     description = "Viewer for Portable Document Format (PDF) files";