Clean up old cruft

The official guide for NixOS shows QT_XKB_CONFIG_ROOT being set, but
it's not entirely clear to me if this is actually needed. Nothing in
Nixpkgs seems to do this. So I'm removing it now.

Also, avoid wrapping wrappers.

Author: jchv

package.nix

@@ -9,7 +9,6 @@
   fontconfig,
   xorg,
   dbus,
-  xkeyboard_config,
   libxkbcommon,
   wayland-scanner,
   kdePackages,
@@ -57,10 +56,13 @@ stdenv.mkDerivation {
     mkdir -p $out/opt
     cp -r * $out/opt
     chmod +x $out/opt/binaryninja
-    makeWrapper $out/opt/binaryninja \
-          $out/bin/binaryninja \
-          --prefix "QT_XKB_CONFIG_ROOT" ":" "${xkeyboard_config}/share/X11/xkb"
+    makeWrapper $out/opt/binaryninja $out/bin/binaryninja \
+      "''${qtWrapperArgs[@]}"
 
     runHook postInstall
   '';
+  dontWrapQtApps = true;
+  meta = {
+    mainProgram = "binaryninja";
+  };
 }