Hi Chris,

On Fri, 17 Nov 2023 at 21:39, Christopher Baines <m...@cbaines.net> wrote:

> The bordeaux build farm depends on computing the derivations on one
> machine, then potentially building them on a different machine.
>
> Some of the build machines don't have a new enough guix-daemon that
> understands builtin:git-download, so derivations that use this are
> sometimes failing (e.g. [1])

Do you mean that the drv file is generated using a new daemon then this
drv file is “offloaded” to another machine using an older daemon and
thus fails to build it?


> One potential approach to address this is somehow have the data service
> indicate that it wants compatible derivations when computing them,
> rather than to have guix do feature detection against the guix-daemon
> that is being used at the point the derivations are being computed.

Other solutions are: downgrade the daemon of one of the machine or
update the daemon of other machines, no?

Why would the latter not be possible?

Cheers
simon



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