You can find it here, if you don’t want to wait hours to compile it. That’s for Manjaro, I think there’s a repo on the AUR that has it too. In the comments.
The first time it was compiling, it almost finished, then failed, because files were missing. So I edited the PKGBUILD and added -j6 to the ninja command, and that did the trick. So probably the AMD Ryzen compiler bug. It’s out of warranty, and I don’t have any spare CPUs. That would mean zero computer until I got a replacement.
I might buy a 3rd gen Ryzen CPU, assuming my motherboard supports them.