A few changes needed here:
- We don’t want to guess what our platform is. We can patch location
and targetdir to not put things in an unpredictable directory.
- Make premake4 a native build input.
- Set the premakefile variable.
They aren't meant to be critical (uncatchable) errors.
Tested with nix-env + checkMeta:
[ "x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux" ]
