> I was thinking about trying out Onivim someday but this one thing was the whole dealbreaker. I thought that if your program is advertised to be light and fast it would also be easy to build, but welp that's unfortunately not the case.

This is not really a reasonable expectation to have for non-free software. The software is made for those willing to pay the licensing fee to download a prebuilt binary, not those that will end up wanting to compile it themselves. Fast performance != fast build times.

I personally appreciate the fact that the source is even provided - though obviously with a non free license.