Look, I’ve got enough on my plate without having to work out how to package an MSYS64 environment that can be safely installed to an arbitrary path without fucking up anything else on a person’s machine. TBH I don’t even know if the tools package on mamedev.org meets those requirements. There isn’t any even documentation for how it’s made, or how to reproducibly create it. I wouldn’t install the damn thing on my own computer. Micko appeared to be making some effort to update it, but then he disappeared again.