Of those, only an x86_64-linux-musl cross compiler strikes me as even remotely unusual, and that's still widely available.

You mean besides just install the relevant packages by: "pacman -S git lua52 gzip coreutils gcc musl" on a standard arch install? (presumably similar for other distros)

That's... a list of things I already have installed, the Lua executable aside. This is a pretty normal-looking dependency list for native C software. Are you perhaps not used to building C software?