bug#41400: Current biber version is incompatible with biblatex

[Mikhail Tsykalov]

Hi,

On 29.05.2020 18:38, Ludovic Courtès wrote:
> Not long ago, I did this:
>
>    commit 40fd909e3ddee2c46a27a4fe92ed49d3e7ffb413
>    Author: Ludovic Courtès <ludo@gnu.org>
>    Date:   Fri Apr 24 16:17:38 2020 +0200
>
>        gnu: biber: Downgrade to 2.11.
>
>        Biber 2.12 is incompatible with biblatex 3.11, which is what's currently
>        packaged.  This is a followup to 
> 41a010875ba4108e666f11fc111cf5bb5dcf5464.
>
>        * gnu/packages/tex.scm (biber): Downgrade to 2.11.
>
> However, it seems that biblatex has been updated in the meantime.
>
> Could you check whether reverting the commit above fixes the problem for
> you?
>
> Thanks,
> Ludo’.

Yes, reverting 40fd909e3ddee2c46a27a4fe92ed49d3e7ffb413 seems to fix the 
problem.

I have no idea why biber's test suite doesn't check that biblatex 
version is compatible.

Can we add guix-specific check, so the package would fail to build if 
similar thing happens?