From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#29106: Build loop after changing pulseaudio and
	emacs-ido-completing-read+
Date: Wed, 29 Nov 2017 17:43:57 +0100
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To: Oleg Pykhalov <go.wigust@gmail.com>
Cc: 29106@debbugs.gnu.org

Hi Oleg,

Oleg Pykhalov <go.wigust@gmail.com> skribis:

> ludo@gnu.org (Ludovic Court=C3=A8s) writes:
>
>> Ping!
>>> Also, is the =E2=80=9Cbuild loop=E2=80=9D you mentioned fixed with this=
 patch?
>
> Sorry, I don't see any patches attached.

See <https://bugs.gnu.org/29106> (the issue we=E2=80=99re talking about.)  =
There
you submitted an emacs-ido-completing-read+ patch=C2=B9, and it isn=E2=80=
=99t clear
to me how it relates to the initial problem you reported.

=C2=B9 https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D29106#8

> I still have never ending pulseaudio derivation build if I add
> ("python-pyqt" ,python-pyqt) to the inputs field.

OK, I suppose that=E2=80=99s because python-pyqt indirectly depends on
pulseaudio (currently Guix doesn=E2=80=99t try to detect cycles around
derivations, which is why you get this =E2=80=9Cnever-ending=E2=80=9D behav=
ior.)

The usual approach to break such cycles is by having a =E2=80=9C-minimal=E2=
=80=9D
variant of one of the packages in the loop.

Would it work for you?

Thanks,
Ludo=E2=80=99.