Tanguy Le Carrour <tanguy@bioneland.org> writes:

> Le 10/18, Marius Bakke a écrit :
>> On the next 'core-updates' cycle, Pytest 5 will then become the default,
>> and we will have to fix all packages that does not work with that
>> version :-)
>
> I guess those broken packages will show up as "red" in Cuirass!?
> Would they have to be fixed, or just told to use python-pytest-4?

The answer to that is "it depends" :-)

If the fix is easy or obvious, we do that; but it's OK to use Pytest 4
if a proper fix turns out to be difficult.

> Is there a way to build those packages on my machine? What a
> script to find and build all the packages dependent on pytest would look like?
> I mean, using LISP/Scheme/Guile, as I think I could come up with a
> "manual" solution with `guix graph --type=reverse-package`.

Try `guix refresh -l python{,2}-pytest`.