GNU bug report logs - #57801
'inferior-with-channels' is eager, making it hard to use in channels

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Maxime Devos <maximedevos <at> telenet.be>
To: bug-guix <bug-guix <at> gnu.org>
Subject: 'inferior-with-channels' is eager, making it hard to use in channels
Date: Wed, 14 Sep 2022 14:28:20 +0200

[Message part 1 (text/plain, inline)]

As experienced by Luks6655, you can't do

(define inferior (inferior-with-channels CHANNELS))

on the top-level of a channel module.  I think the issue is that 
inferior-with-channels is eager (not lazy), so it cannot be used in a 
channel on the top-level, as builds (including channel builds) are 
isolated from the network and have limited access to the file system.

If it would be made lazy, then

(define inferior (inferior-with-channels CHANNELS))
(define-public p
  (package
    [...]
    (inputs (list (lookup-inferior-package inferior "hello")))))

should, in theory, work (unverified).

Greetings,
Maxime.

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