Trying to run the package on TCL-11.0 requires a lot more dependencies to be loaded but still failed with:
tc@box:~$ sudo ostinato
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, webgl, xcb.
Aborted
tc@box:~$
Only if I also load 'qt-5.x-dev' with all its dependencies it will run.
Other packages I had to install:
tce-load -wi harfbuzz.tcz
tce-load -wi libGL.tcz
tce-load -wi gcc_libs.tcz
tce-load -wi libzstd.tcz