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=f8c143a7131d6f40f387f4cd2ad1fa78b5e2f429'>root</a>/<a href='/guix/log/gnu?id=f8c143a7131d6f40f387f4cd2ad1fa78b5e2f429'>gnu</a>/<a href='/guix/log/gnu/packages?id=f8c143a7131d6f40f387f4cd2ad1fa78b5e2f429'>packages</a>/<a href='/guix/log/gnu/packages/scribus.scm?id=f8c143a7131d6f40f387f4cd2ad1fa78b5e2f429'>scribus.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/packages/scribus.scm?id=f8c143a7131d6f40f387f4cd2ad1fa78b5e2f429&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-08-13 12:44:06 +0200'>2019-08-13</span></td><td><a href='/guix/commit/gnu/packages/scribus.scm?id=77bdfe2f138e7c074c2eb94de3a44561da39d966'>gnu: scribus: Update to 1.5.5.</a><span class='msg-avail'>...</span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2018-12-12 20:49:12 +0100'>2018-12-12</span></td><td><a href='/guix/commit/gnu/packages/scribus.scm?id=143fc1a591c552b0464674cfebf8de63bdde7461'>gnu: poppler: Update to 0.72.0.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-11-27 23:56:12 +0100'>2018-11-27</span></td><td><a href='/guix/commit/gnu/packages/scribus.scm?id=4236959de8200bba4eeb2c23519fc736b3c50a23'>gnu: scribus: Fix build with recent Poppler.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>