CEMU fails to build

I didn’t try the Linux version of CEMU (should be new, I didn’t even know there was one //EDIT: ok it is not a Linux version I looked at the PCKGBUILD), but CEMU in Lutris (Windows version under WINE) works perfectly for me for years now.

Install CEMU from Lutris this way you will have proper WINE version with enhanced features patched, DXVK and other good stuff.