This weekend's sync will include some additional information to help people figure things out though, in particular it'll have the ability to dump a table of all symbols, which you can then look through to find a function you need (e.g. system-name, in this case).
That said I'm not 100% convinced that the location functions work correctly yet, but I've just copied the logic from how they were implemented before as wildcards, so they should at least work/not work in the same way.
"On two occasions I have been asked,—"Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?" I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question."
- Charles Babbage