Re: How to properly upgrade Guix System & Home?

[Julien Lepiller]

Most likely, you're just seeing a weird behavior caused by grafts. To make a 
graft, guix needs the ungrafted package first, so it downloads it, grafts it 
and adds it to the profile. The grafted package is live, so it's protected 
against garbage collection. The ungrafted package is not, so it gets garbage 
coldected.

When you reconfigure, guix needs to download the ungrafted package before it 
figures out it already has the graft.

Since they have the same name and version, I think you're just cwnfusing the 
two :)

Le 22 mars 2023 18:11:45 GMT+01:00, Tanguy LE CARROUR <tanguy@bioneland.org> a 
écrit :
>Hi Guix,
>
>For quite some time, I'd been religiously upgrading my system weekly.
>My mantra was something along those lines:
>
>```console
>$ sudo guix system delete-generations
>$ guix package --delete-generations
>$ guix gc
>$ guix pull
>$ sudo guix system reconfigure my-system.scm
>$ guix package --upgrade
>```
>
>I was happy with it, but two recent events made me question my faith in this…
>
>1) I realized that there was a third `delete-generations`!
>
>Believe it or not, I didn't know about `guix pull --delete-generations`.
>Actually `guix pull --list-generations` was listing a **lot** of month
>old stuff.
>
>2) I migrated to Guix Home!
>
>Suddenly everything I thought I understood didn't seem to make any sense
>any more! For instance, I can do `guix home reconfigure` and `guix gc` in
>a loop and `guix home reconfigure` will keep on downloading things and
>`guix gc` will keep on deleting them!? And when I say "things", I mean
>packages that are explicitly declared in `my-home.scm` and that I actually use!
>When I compare `ls -l (which imv)` before and after a cycle
>(`guix home reconfigure` / `guix gc`), I have the same hash.
>Which make sense because I haven't `guix pull` in between. So, why is a `imv`
>garbage collected and re-downloaded/installed?!
>
>Does it make any sense? Am I the only one facing this issue? What's the
>proper way of upgrading a Guix System & Home?
>
>Any help would be very much appreciated!
>