doc/languages-frameworks/gnome: update Qt package example

Part of #180841

Updated the existing example to reflect changes from a later version of
the same package:
https:/NixOS/nixpkgs/blob/b293f6561ea74ccd9ddafe49f8227caf5b85f720/pkgs/applications/misc/calibre/default.nix

Co-authored-by: Jan Tojnar <[email protected]>

doc/languages-frameworks/gnome.section.md

@@ -155,9 +155,11 @@ There are no schemas available in `XDG_DATA_DIRS`. Temporarily add a random pack
 
 Package is missing some GSettings schemas. You can find out the package containing the schema with `nix-locate org.gnome.foo.gschema.xml` and let the hooks handle the wrapping as [above](#ssec-gnome-common-issues-no-schemas).
 
-### When using `wrapGApps*` hook with special derivers you can end up with double wrapped binaries. {#ssec-gnome-common-issues-double-wrapped}
+### When using `wrapGApps*` hook with special derivers or hooks you can end up with double wrapped binaries. {#ssec-gnome-common-issues-double-wrapped}
 
-This is because derivers like `python.pkgs.buildPythonApplication` or `qt5.mkDerivation` have setup-hooks automatically added that produce wrappers with makeWrapper. The simplest way to workaround that is to disable the `wrapGApps*` hook automatic wrapping with `dontWrapGApps = true;` and pass the arguments it intended to pass to makeWrapper to another.
+This is because some setup hooks like `qt6.wrapQtAppsHook` also wrap programs using `makeWrapper`. Likewise, some derivers (e.g. `python.pkgs.buildPythonApplication`) automatically pull in their own setup hooks that produce wrappers.
+
+The simplest workaround is to disable the `wrapGApps*` hook's automatic wrapping using `dontWrapGApps = true;` while passing its `makeWrapper` arguments to another wrapper.
 
 In the case of a Python application it could look like:
 
@@ -184,21 +186,26 @@ python3.pkgs.buildPythonApplication {
 And for a QT app like:
 
 ```nix
-mkDerivation {
+stdenv.mkDerivation {
  pname = "calibre";
  version = "3.47.0";
 
  nativeBuildInputs = [
  wrapGAppsHook3
+ qt6.wrapQtAppsHook
  qmake
  # ...
  ];
 
+ dontWrapQtApps = true;
  dontWrapGApps = true;
 
- # Arguments to be passed to `makeWrapper`, only used by qt5’s mkDerivation
  preFixup = ''
- qtWrapperArgs+=("''${gappsWrapperArgs[@]}")
+ for program in $out/bin/*; do
+ wrapProgram $program \
+ ''${qtWrapperArgs[@]} \
+ ''${gappsWrapperArgs[@]}
+ done
  '';
 }
 ```