[bug#70839] [PATCH 3/3] services: guix: Default `channels' field to #f.

[Tomas Volf <~@wolfsden.cz>]

In the absence of the /etc/guix/channels.scm file, %default-channels is used
anyway.  If user manually (or by extra-special-file) created the file, we
should respect it.  This commit therefore changes the default to #f, hopefully
having zero impact on people not actively using the `channels' field.

* gnu/services/base.scm (<guix-configuration>)[channels]: Set default to #f.

Change-Id: I516c1735a037a153fabbebfc337051aaf0be2155
---
 doc/guix.texi         | 2 +-
 gnu/services/base.scm | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 568878ad24..9f422f8212 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -19591,7 +19591,7 @@ Base Services
 not need it and where the extra boot time is a problem.
 
 @anchor{guix-configuration-channels}
-@item @code{channels} (default: @code{%default-channels})
+@item @code{channels} (default: @code{#f})
 List of channels to be specified in @file{/etc/guix/channels.scm}, which
 is what @command{guix pull} uses by default (@pxref{Invoking guix
 pull}).
diff --git a/gnu/services/base.scm b/gnu/services/base.scm
index 85160bd3ab..c5f28fd611 100644
--- a/gnu/services/base.scm
+++ b/gnu/services/base.scm
@@ -1830,7 +1830,7 @@ (define-record-type* <guix-configuration>
   (generate-substitute-key? guix-configuration-generate-substitute-key?
                             (default #t))         ;Boolean
   (channels         guix-configuration-channels ;file-like
-                    (default %default-channels))
+                    (default #f))
   (chroot-directories guix-configuration-chroot-directories ;list of file-like/strings
                       (default '()))
   (max-silent-time  guix-configuration-max-silent-time ;integer
-- 
2.41.0