Ludovic Courtès <ludo@gnu.org> writes:

> Hi,
>
> Pierre Neidhardt <mail@ambrevar.xyz> skribis:
>
>> The COLUMN environment option (set in root's .bash_profile) does not
>> extend the print width of backtraces when running `guix build`.
>
> I understand, but which backtraces are we talking about?
>
> COLUMNS only helps if you wish to debug ‘guix build’ itself.  It cannot
> influence Guile processes launched by the daemon, such as those that
> build derivations and the helper processes (‘guix substitute’, etc.).

I'm confused.  `guix build' uses the daemon to build, doesn't it?

> In most cases, we’re interested in backtraces coming from Guile
> processes that build derivations.  For that, we need to set COLUMNS in
> the #:env-vars argument of ‘gexp->derivation’ or similar.

Can't we do this globally and by default?

-- 
Pierre Neidhardt
https://ambrevar.xyz/