bug#40079: emacs-elpy-1.31.0: failed to build

[Ricardo Wurmus]

Marius Bakke <address@hidden> writes:

> sirgazil via Bug reports for GNU Guix <address@hidden> writes:
>
>> I couldn't upgrade the packages in my user profile because "emacs-elpy" 
>> check phase fails. 
>>
>>
>> ## Steps to reproduce
>>
>> 1. guix pull
>> 2. guix build emacs-elpy
>>
>>
>> ## Unexpected result
>>
>>
>> The output of the check phase:
>>
>> ---------------------------
>> starting phase `check'
>>
>> Can’t guess python-indent-offset, using defaults: 4
>
> This seems to stem from the update of 'python-black' in
> 5f603fab23e7df7e7b76566b3add24b65e92f807.  Reverting that commit makes
> this package build.
>
> @Ricardo: Any objections to reverting the commit?

I’d rather not revert but add an older variant of python-black for elpy.

-- 
Ricardo