Hello Guix, I've successfully updated my x86_64 GuixSD system to my private branch based on 'core-updates' with recent 'master' and 'staging' merged into it. This system includes a full GNOME desktop environment plus a few programs based on Qt. It all works quite well.
My branch includes a few draft fixes and workarounds that I haven't yet pushed, but nothing that would require many rebuilds to update later. So, I think it might be time to ask Hydra to build all of core-updates, after staging is merged into it. What do you think? Mark