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doc/languages-frameworks/gnome: update Qt package example (#348646)

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10
doc/languages-frameworks/gnome.section.md
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@ -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:
@ -184,19 +186,19 @@ python3.pkgs.buildPythonApplication {
And for a QT app like:
```nix
mkDerivation {
stdenv.mkDerivation {
pname = "calibre";
version = "3.47.0";
nativeBuildInputs = [
wrapGAppsHook3
qt6.wrapQtAppsHook
qmake
# ...
];
dontWrapGApps = true;
# Arguments to be passed to `makeWrapper`, only used by qt5’s mkDerivation
preFixup = ''
qtWrapperArgs+=("''${gappsWrapperArgs[@]}")
'';