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'))
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<tr><td><span title='2023-02-26 10:19:36 +0100'>2023-02-26</span></td><td><a href='/guix/commit/tests/hackage.scm?id=84549dcf380b1ed7712816a1ff1bfe9688c1d9a7'>import: hackage: Add upstream-name property.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2022-06-06 13:26:51 +0200'>2022-06-06</span></td><td><a href='/guix/commit/tests/hackage.scm?id=143141726e6c1b3f1170e9f4e971700e30d74375'>import: hackage: Filter upper/mixed case dependencies too.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2022-06-06 13:26:45 +0200'>2022-06-06</span></td><td><a href='/guix/commit/tests/hackage.scm?id=dedfcaa8e2b948124f76121b9062c827fe649e29'>import: hackage: Filter internal libraries from inputs and native-inputs.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2022-06-06 13:26:45 +0200'>2022-06-06</span></td><td><a href='/guix/commit/tests/hackage.scm?id=c3fbaee34548fbfb1617dc7fccc94c598efbd7a6'>import: cabal: Support library names</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2022-06-06 13:26:45 +0200'>2022-06-06</span></td><td><a href='/guix/commit/tests/hackage.scm?id=f4763ec37df1aa03569ceff30192f5bf4bd736a8'>import: cabal: Document failing syntax through tests.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2022-06-06 13:26:45 +0200'>2022-06-06</span></td><td><a href='/guix/commit/tests/hackage.scm?id=e3337f35afa83e746f0a66451fd4d2212c032b03'>import: cabal: Allow curly bracket before else statement.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2022-06-06 13:26:45 +0200'>2022-06-06</span></td><td><a href='/guix/commit/tests/hackage.scm?id=001e0bac99c977d2ff04910295b154f91aa3d369'>import: cabal: Allow properties without space between key and value.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2022-06-06 13:26:45 +0200'>2022-06-06</span></td><td><a href='/guix/commit/tests/hackage.scm?id=0972feaff1f766c1759d0b89876132ae473725ce'>import: cabal: Allow curly brackets in more positions.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2022-06-06 13:26:09 +0200'>2022-06-06</span></td><td><a href='/guix/commit/tests/hackage.scm?id=2c5d18e421e6c06f4a969f98585ec41aae8eb2e4'>import: cabal: Support elif statement.</a><span class='msg-avail'>...</span></td><td>Lars-Dominik Braun</td></tr>
<tr><td><span title='2021-12-05 19:17:41 +0100'>2021-12-05</span></td><td><a href='/guix/commit/tests/hackage.scm?id=9bc0f45df5d6aed217020b1183dca54989844fb0'>Merge remote-tracking branch 'origin/master' into core-updates-frozen</a></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2021-12-01 17:53:25 +0100'>2021-12-01</span></td><td><a href='/guix/commit/tests/hackage.scm?id=39f4ef59ffc37259de40f67c476a1a720aa8d007'>build-system: haskell: Add ‘hackage-uri’ procedure.</a><span class='msg-avail'>...</span></td><td>Xinglu Chen</td></tr>