Hello Guix! Until now ‘guix pull’ would fetch a ~13 MiB snapshot of our Git repository when you invoke it. This is no longer the case (at last!) with a change that makes it use Guile-Git (bindings to libgit2) instead. There are other goodies such as the new ‘--branch’ and ‘--commit’ options. Next time you run ‘guix pull’, it’ll fetch the new ‘guix pull’, which has this new Guile-Git requirement. There are several scenarios here: 1. Guile-Git is already in your environment so you won’t notice anything. This is the case if you’ve reconfigured GuixSD recently, or if you’re on a foreign distro and you’ve upgraded the ‘guix’ package of root recently. 2. Guile-Git is not yet in your environment, so the next time you run ‘guix pull’ you’ll get a message telling you to install the ‘guile-git’ (or ‘guile2.0-git’) package. Once you’ve done that, you should be fine. 3. You’re upgrading from a Guix snapshot from before February 2017 (i.e., a Guix that lacks a ‘guile-git’ package.) In that case ‘guix pull’ will refuse to upgrade and tell you to upgrade to 0.13.0 first, which will then allow you to upgrade to the latest master. Please report any issues! Thanks, Ludo’.