[jcelerier]

> The speed of the solver is not a problem in any other package management system I've seen

really ? It has been a large problem in Debian for instance and has enabled a lot of research (https://scholar.google.fr/scholar?q=debian+solver). One of the reason for Fedora's yum -> dnf change was also a change of solver. It's a hard problem that affects a lot of people.

[pcx]

To clarify, I(and the OP) was specifically talking about programming language specific package managers.

[lathiat]

puppet dependency managers have also been an issue it's certainly easy to solve poorly

[sametmax]

You can't compare languages and os package manager. They are on a completely different scale.