Extracted from https://github.com/ocaml/opam/pull/6520/commits/f5c7c2d673cf946e6e4acd6e6b5866afe554aeda#r2105070925 In that example, it would be great to show: ``` === install 3 packages - install bar 1 [required by baz] - install foo 1 [required by bar, truc] - install truc 1 [required by foo.2] ```