This might be a silly question, but both wiki pages and guides often mention to look at the definitions of some expression. For example, the wiki page for manpages says
See also: the other options in the `documentation` namespace.
How do I do this the best way possible? I have cloned nixpkgs into an arbitrary directory and am browsing it with my editor, but I don’t think I have any (good) way of knowing if the expression I’m looking at corresponds to the same version available on my system (since pkgs are updated).
Is there a canonical way to access the definitions? And as a sidenote, if there is, how do you actually search them? It feels somewhat silly to just open up fzf and vim, but I haven’t seen many other options.