From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jack Hill <jackhill@jackhill.us>
Subject: Re: Why are these derivations different?
Date: Mon, 10 Jun 2019 13:25:38 -0400 (EDT)
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To: Marius Bakke <mbakke@fastmail.com>
Cc: help-guix@gnu.org

On Mon, 10 Jun 2019, Marius Bakke wrote:

>> What's really going on with --no-grafts. Is it that guix on my less
>> powerful host has never seen the the ungoogled-chromium version build
>> against the older dependencies, so doesn't accept the older version that
>> could be grafted? I guess, I'm not sure exactly what you mean by "fails to
>> realize the grafted derivation". Is that a bug?
>
> Sorry, just a lazy and poor attempt at explaining what's going on...  :-)

No worries, I appreciate you taking the time to help me understand.

>> Sorry, I don't think that question was very clear. It probably means that
>> while I think I know what grafts are, I don't know enough about what's
>> going on to ask the question properly. I think this all could be summarized
>> as, "please explain more."
>
> Grafts are are ignored in some parts of Guix.  In this case, if you
> inspect the profile derivation when doing 'guix install -n
> ungoogled-chromium', you can see that the computed profile.drv needs to
> produce the ungrafted ungoogled-chromium-x.y.z.drv, because the
> profile-builder references the _ungrafted_ package.
>
> I'm not sure of the exact mechanics that follow, but I guess grafts are
> only computed afterwards, recursively, for the generated profile.

Ok, thank help. Thank you.

Jack