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From: | Jack Hill |
Subject: | Re: Why are these derivations different? |
Date: | Sat, 8 Jun 2019 22:43:14 -0400 (EDT) |
User-agent: | Alpine 2.20 (DEB 67 2015-01-07) |
On Sat, 8 Jun 2019, Marius Bakke wrote:
Jack Hill <address@hidden> writes:Hi Guix, I'm trying to copy the store items for ungoogled-chromium from one of my hosts that has many computational resources to another one that does not, so that I do not have to build ungoogled-chromium on the less powerful host. However, even after copying the store items using guix archive --export | guix archive --import, the less powerful host wants to build ungoogled-chromium because the derivations differ (see attachments).I suspect this has to do with grafts. Guix is missing a substitute for the 'ungrafted' package and fails to realize the grafted derivation. Exporting with --no-grafts should do the trick.
Marius, Thanks! That was it.If you don't mind, I have a few follow up question to help me understand how everything works:
How is guix archive --no-grafts different from guix build --no-grafts? Oh, or after reading the manual for --no-grafts again, maybe I used the wrong incantation (guix build --no-grafts package-name instead of guix build package-name --no-grafts)?
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, 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."
Many thanks, Jack
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