Sometimes you need a specific version of ZIG. It's been the case to me the other
day, when I wanted to try out a repo I found on github just quickly.
In particular it was my twin brother's repo GPT4All.zig,
and I wanted to see if it would run even on my small powered dev laptop (a 2nd
hand IBM thinkpad I bought on amazon for EUR 350.00).
ZIG is moving ahead quite fast, and usually does not break a backwards-compatibility for no reason of course. But the build system in this particular case had already
