@tobiasBora do you have any ideas here? I remember you made a package for raysession in another post. I tried out the package you made but it didn’t work even after calling the package with all the arguments it requests (as follows).
raysession = callPackage ../applications/audio/raysession {
inherit (python3Packages) buildPythonApplication pydbus pyliblo pyqt5;
inherit (qt5) qttools;
};