GTK file dialog not working in bitwig studio 4.0.1

Hello fellow nixOS users :slight_smile:

Since the new version of bitwig-studio from nixos unstable the gtk file dialog isn’t working anymore.

While I can manually run it from the command line like that:

[I] ➜ /nix/store/vwhrcd9jiy0gc3jb2b60v4p02qibikdy-bitwig-studio-4.0.1/libexec/bin/show-file-dialog-gtk3

(show-file-dialog-gtk3:202979): dconf-WARNING **: 17:40:44.620: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name ca.desrt.dconf was not provided by any .service files
... more of these warnings

When I try to open it from the app I am getting that error:

This command is not for general use and should only be run as the result of a call to
ProcessBuilder.start() or Runtime.exec() in a java application
[2021-08-14 16:34:17.437 x11-windowing-system error] Error launching show file dialog command: Error retrieving localized message for exception class java.util.MissingResourceException: Can't find resource for bundle java.util.PropertyResourceBundle, key ProcessException.message
	at com.bitwig.x11_windowing_system.X11FileDialog.OgE(SourceFile:206)
	at com.bitwig.x11_windowing_system.X11FileDialog.bWD(SourceFile:32)
	at java.base/ Source)
Caused by: Cannot run program "/nix/store/vwhrcd9jiy0gc3jb2b60v4p02qibikdy-bitwig-studio-4.0.1/libexec/bin/show-file-dialog-gtk3": error=0, Failed to exec spawn helper: pid: 617783, exit value: 1
	at java.base/java.lang.ProcessBuilder.start(Unknown Source)
	at java.base/java.lang.ProcessBuilder.start(Unknown Source)
	... 4 more
Caused by: error=0, Failed to exec spawn helper: pid: 617783, exit value: 1
	at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
	at java.base/java.lang.ProcessImpl.<init>(Unknown Source)
	at java.base/java.lang.ProcessImpl.start(Unknown Source)
	... 7 more

All the resources I have found with similar problems recommend adding something like that to the package but the bitwig-studio package already has these

nativeBuildInputs = [

  buildInputs = [

not sure what this does:

  dontWrapGApps = true; # we only want $gappsWrapperArgs here

but it’s not working without.

Woud be great if someone could give me a pointer.