[innguest]

Yes, thank you! But people still want to "solve" the problem the hard way, I guess.

Also, "Java" is mentioned twice in the article but I can't find mention of Ocaml Functors. I thought they solved most package problems even before Nix was around?

[tel]

There's a bit of missing context: the author is writing this most likely as part of his research on implementing Backpack—a systems which would being OCaml Functor-like things to Haskell.

[mercurial]

Functors are part of the Ocaml module system, but they don't really have any relation to package management with version numbers and dependencies.