Taken from debian.

# Description: Disable update check by default.
Index: calibre/src/calibre/gui2/main.py
===================================================================
--- calibre.orig/src/calibre/gui2/main.py	2014-02-02 10:41:28.470954623 +0100
+++ calibre/src/calibre/gui2/main.py	2014-02-02 10:41:56.546954247 +0100
@@ -37,8 +37,8 @@
                       help=_('Start minimized to system tray.'))
     parser.add_option('-v', '--verbose', default=0, action='count',
                       help=_('Ignored, do not use. Present only for legacy reasons'))
-    parser.add_option('--no-update-check', default=False, action='store_true',
-            help=_('Do not check for updates'))
+    parser.add_option('--update-check', dest='no_update_check', default=True, action='store_false',
+            help=_('Check for updates'))
     parser.add_option('--ignore-plugins', default=False, action='store_true',
             help=_('Ignore custom plugins, useful if you installed a plugin'
                 ' that is preventing calibre from starting'))
ut</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'>refs</a><a class='active' href='/guix/log/gnu/build/linux-container.scm'>log</a><a href='/guix/tree/gnu/build/linux-container.scm?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'>tree</a><a href='/guix/commit/gnu/build/linux-container.scm?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'>commit</a><a href='/guix/diff/gnu/build/linux-container.scm?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/build/linux-container.scm'>
<input type='hidden' name='id' value='f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'>root</a>/<a href='/guix/log/gnu?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'>gnu</a>/<a href='/guix/log/gnu/build?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'>build</a>/<a href='/guix/log/gnu/build/linux-container.scm?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46'>linux-container.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/build/linux-container.scm?id=f206900b92a230ebc7f97c22cf5e79cf0e6b6e46&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-01-30 22:24:27 +0100'>2023-01-30</span></td><td><a href='/guix/commit/gnu/build/linux-container.scm?id=0ef8fe22ed8985c9656835fc25ab3463d55b6669'>linux-container: 'container-excursion' forks to join the PID namespace.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/61156&gt;.

* gnu/build/linux-container.scm (container-excursion): Add extra call to
'primitive-fork' and invoke THUNK in the child process.
* tests/containers.scm ("container-excursion"): Remove extra
'primitive-fork' call, now unnecessary.
("container-excursion*, /proc"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-01-30 22:24:27 +0100'>2023-01-30</span></td><td><a href='/guix/commit/gnu/build/linux-container.scm?id=52eb3db19cb9e5c294c86a8552a4baaa5b473672'>container: Correctly report exit status.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/linux-container.scm (container-excursion): Return the raw
status value.
* tests/containers.scm ("container-excursion, same namespaces"): Add
'status:exit-val' call.
* guix/scripts/container/exec.scm (guix-container-exec): Correctly
handle the different cases.
</span></span></td><td>Ludovic Courtès</td></tr>