Hi everybody!
I had some time and had a look at GUB. I managed to build a mingw installer of lilypond + cairo backend. Gub succeeded, but that does not mean a lot ;-) I do not have access to a PC with a MS Windows installation, so it would be nice if a few people could test this installer. Download lilypond-2.23.4-1.mingw.exe <https://drive.google.com/file/d/1lZcrZW_qQhfNFFPfWNxiT6PV9qYmGsRf/view?usp=sharing> Any combination of '--ps', '--pdf', '--svg', and '--png' should work in combination with the '-dbackend=cairo' command line option. Please report success / failure and the windows version you use. Thanks, Knut