Comment by dns_snek
It's not just "one missing section", and we're not just talking about some fringe language feature but the build system which is probably the most complex, important, and under documented part of the language.
The official answer to complaints about missing documentation has always been "ask in Discord". Pretending that this isn't the case is just disingenuous.
> But to answer your question, it exists in the comments of the auto-generated build.zig.zon file
The comments document the file format of build.zig.zon, they don't tell you anything about how to actually use a dependency in your build system.
I've added more explanatory comments in the new template that ships with 0.15.1, also you might be interested in this video https://www.youtube.com/watch?v=jy7w_7JZYyw