[tombert]

Wait, this is a big deal. Will it work with any package manager or only things that it explicitly supports?

One thing that has become a persistent headache for me with Nix is trying to get reproducible builds with Julia, due to the fact that the package manager doesn't have direct integration with Nix, and `nix build` purposefully restricts network access. I'd happily move to Guix if they have an elegant way to deal with this.

[Slackwise]

Since it's all just Guile Scheme, a full programming language, you can extend it in any way you want, and use the Scheme libraries you want, doing whatever network access you please.

[k8svet]

The builder is sandboxed, the whole model goes out the window otherwise.

Also, I really doubt Guix moves the needle much here. It can't make Julia magically more reproducible without effectively doing the same techniques you'd have to use in Nix.