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'))
=402561ccefd5367ec878461cc088b533993ba0b7'>refs</a><a href='/guix/log/'>log</a><a href='/guix/tree/?id=402561ccefd5367ec878461cc088b533993ba0b7'>tree</a><a href='/guix/commit/?id=402561ccefd5367ec878461cc088b533993ba0b7'>commit</a><a class='active' href='/guix/diff/?id=402561ccefd5367ec878461cc088b533993ba0b7'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/'>
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<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='402561ccefd5367ec878461cc088b533993ba0b7'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/guix/diff/?id=402561ccefd5367ec878461cc088b533993ba0b7'>Diffstat</a></div><table summary='diffstat' class='diffstat'><tr><td class='mode'>-rw-r--r--</td><td class='upd'><a href='/guix/diff/gnu/packages/python.scm?id=402561ccefd5367ec878461cc088b533993ba0b7'>gnu/packages/python.scm</a></td><td class='right'>4</td><td class='graph'><table summary='file diffstat' width='4%'><tr><td class='add' style='width: 50.0%;'/><td class='rem' style='width: 50.0%;'/><td class='none' style='width: 0.0%;'/></tr></table></td></tr>
</table><div class='diffstat-summary'>1 files changed, 2 insertions, 2 deletions</div><table summary='diff' class='diff'><tr><td><div class='head'>diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm<br/>index 4703d95a2d..6a2bd6e8f5 100644<br/>--- a/<a href='/guix/tree/gnu/packages/python.scm?id=5103c98f68490d32e71fe7208161450de4fb6f43'>gnu/packages/python.scm</a><br/>+++ b/<a href='/guix/tree/gnu/packages/python.scm?id=402561ccefd5367ec878461cc088b533993ba0b7'>gnu/packages/python.scm</a></div><div class='hunk'>@@ -11418,7 +11418,7 @@ editors.")</div><div class='ctx'> (define-public python2-backports-functools-lru-cache</div><div class='ctx'>   (package</div><div class='ctx'>     (name "python2-backports-functools-lru-cache")</div><div class='del'>-    (version "1.3")</div><div class='add'>+    (version "1.5")</div><div class='ctx'>     (source</div><div class='ctx'>      (origin</div><div class='ctx'>        (method url-fetch)</div><div class='hunk'>@@ -11426,7 +11426,7 @@ editors.")</div><div class='ctx'>        (uri (pypi-uri "backports.functools_lru_cache" version))</div><div class='ctx'>        (sha256</div><div class='ctx'>         (base32</div><div class='del'>-         "158ysf2hb0q4p4695abfiym9x1ywg0dgh8a3apd7gqaaxjy22jj4"))))</div><div class='add'>+         "06jgv8gib4fhky0p5cmxdghvsgjyzcdgk48k8pxb1ccf11znk64x"))))</div><div class='ctx'>     (build-system python-build-system)</div><div class='ctx'>     (native-inputs</div><div class='ctx'>      `(("python2-setuptools-scm" ,python2-setuptools-scm)))</div></td></tr></table></div> <!-- class=content -->
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