SIGINT is ignored in the Guix build environment.

--- a/Lib/test/test_regrtest.py
+++ b/Lib/test/test_regrtest.py
@@ -399,6 +399,8 @@
         output = self.run_tests('--fromfile', filename)
         self.check_executed_tests(output, tests)
 
+    @unittest.skipIf(True,
+        "KeyboardInterrupts do not work in the build environment")
     def test_interrupted(self):
         code = TEST_INTERRUPTED
         test = self.create_test('sigint', code=code)
@@ -416,6 +418,8 @@
                  % (self.TESTNAME_REGEX, len(tests)))
         self.check_line(output, regex)
 
+    @unittest.skipIf(True,
+        "KeyboardInterrupts do not work in the build environment")
     def test_slow_interrupted(self):
         # Issue #25373: test --slowest with an interrupted test
         code = TEST_INTERRUPTED
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<div class='path'>path: <a href='/guix/log/?id=f7b1b22e4b0b5c6867bbfed362b0ebd4e5480507'>root</a>/<a href='/guix/log/gnu?id=f7b1b22e4b0b5c6867bbfed362b0ebd4e5480507'>gnu</a>/<a href='/guix/log/gnu/system?id=f7b1b22e4b0b5c6867bbfed362b0ebd4e5480507'>system</a>/<a href='/guix/log/gnu/system/examples?id=f7b1b22e4b0b5c6867bbfed362b0ebd4e5480507'>examples</a>/<a href='/guix/log/gnu/system/examples/desktop.tmpl?id=f7b1b22e4b0b5c6867bbfed362b0ebd4e5480507'>desktop.tmpl</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/system/examples/desktop.tmpl?id=f7b1b22e4b0b5c6867bbfed362b0ebd4e5480507&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-07-29 07:50:23 +0300'>2020-07-29</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=03914b9d8cc5918f495d1abeb97d783c8fc25fd7'>examples: Add password for Alice's brother.</a><span class='msg-avail'>...</span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2019-04-10 12:40:58 +0200'>2019-04-10</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=5c32857f91b26846d202f07226f201fd49852619'>doc: Adjust desktop instructions for GDM.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-04-05 15:39:35 +0200'>2019-04-05</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=305a732a0a19c5810aab401aa7d70eba02ac386b'>services: xorg: Add 'set-xorg-configuration'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-28 23:06:59 +0100'>2019-03-28</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=971e6560eb7b852ccc30d0891c2b7d26e5d0971a'>system: Fix typo in desktop example.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-27 11:54:06 +0100'>2019-03-27</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=391e0d65d7129d53c025963d2758724e75626eb4'>services: Deprecate 'xfce-desktop-service'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-27 11:54:06 +0100'>2019-03-27</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=ee05cc7fe353c1c9b45062343746ac215a29fed5'>services: Deprecate 'gnome-desktop-service'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-25 23:37:06 +0100'>2019-03-25</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=cf848cc0a17a3a58d600116896f6e7abfb0440d4'>accounts: Add default value for the 'home-directory' field of &lt;user-account&gt;.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-23 18:01:16 +0100'>2019-01-23</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=907dd32720cf7ae94876c1da2df775f524f5f795'>gnu: Replace all cons* with beginner-friendly (append (list ...)).</a><span class='msg-avail'>...</span></td><td>Pierre Neidhardt</td></tr>
<tr><td><span title='2019-01-23 18:01:16 +0100'>2019-01-23</span></td><td><a href='/guix/commit/gnu/system/examples/desktop.tmpl?id=ece2fd121866e4f46c5a4be92c6f09b6c1042ea1'>gnu: Fix missing EFI entry in "desktop" example.</a><span class='msg-avail'>...</span></td><td>Pierre Neidhardt</td></tr>