bug#54558: mcomix refuses to run, missing GTK libraries

Hi there, I've just tried to install mcomix on Guix System, but have had no luck running it. Upon installing and trying to run it in the shell, it fails with: > [MainThread] ERROR: You do not have the required versions of GTK+ 3.0 > installed. Does GTK need to be added to its inputs?

bug#52993: There is a problem with text rendering in the anki

I'm not the OP, but that QTWEBENGINE_CHROMIUM_FLAGS trick works for me.