Thread:Extension talk:Scribunto/Additional binaries installation/reply

"Additional binaries" means the latter: if the provided binaries don't work on your system for some reason, you'll have to provide a binary that does if you want to use Scribunto. Or, I suppose, you could install the luasandbox PHP extension, but that's probably harder.

If one of the provided binaries works for you, there's probably no reason not to use it. And if your setup is so unusual that there is a good reason not to, you probably already know all about it.

The binary you need is "lua5.1". The other two are not needed by Scribunto at all. FYI: "luac" will convert a Lua script into bytecode, and "bin2c" converts that bytecode file into a C source file (for embedding it in another program).