Re: Dependence on an old version of a package.

[Simon Tournier]

Hi,

On Sun, 10 Dec 2023 at 09:18, Philippe Veber <philippe.veber@gmail.com> wrote:

> (define mychannels
>   (list (channel
>          (name 'guix)
>          (url "https://git.savannah.gnu.org/git/guix.git";)
>          ;; Last commit that still has openmpi < 4.0.0
>          (commit
>           "1482531cd7d0f1f7e565207240affb68dd822e17"))))

--8<---------------cut here---------------start------------->8---
$ guix time-machine --commit=1482531cd7d0f1f7e565207240affb68dd822e17 -- help
guix time-machine: error: cannot travel past commit `6298c3ffd965' from May 
1st, 2019
--8<---------------cut here---------------end--------------->8---


>      My question is this: should I just be patient and wait for it to
> complete or I'm doing this wrong?

You are trying to time-travel to something before the introduction of
time-travel.  Hence the unexpected behaviour, I guess.

Thanks for reporting that something is missing.  The inferior should
stop and error out.  It does not because ’cached-channel-instance’ is
currently called with the argument ’#:validate-channels’ set to the
default (const #t).

Currently, the verification is only done in
guix/scripts/time-machine.scm.  Well, this issue seems being part of
bug#65788 [1].


1: bug#65788: poor information when updating using “guix time-machine”
Simon Tournier <zimon.toutoune@gmail.com>
Wed, 06 Sep 2023 18:57:38 +0200
id:87pm2vme7x.fsf@gmail.com
https://issues.guix.gnu.org/65788
https://issues.guix.gnu.org/msgid/87pm2vme7x.fsf@gmail.com
https://yhetil.org/guix/87pm2vme7x.fsf@gmail.com

Cheers,
simon