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=949457c150b30f4a775d2da4d93e9297d417b1e1'>root</a>/<a href='/guix/log/gnu?id=949457c150b30f4a775d2da4d93e9297d417b1e1'>gnu</a>/<a href='/guix/log/gnu/packages?id=949457c150b30f4a775d2da4d93e9297d417b1e1'>packages</a>/<a href='/guix/log/gnu/packages/sdcc.scm?id=949457c150b30f4a775d2da4d93e9297d417b1e1'>sdcc.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/sdcc.scm?id=949457c150b30f4a775d2da4d93e9297d417b1e1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-03-01 22:21:02 +0100'>2018-03-01</span></td><td><a href='/guix/commit/gnu/packages/sdcc.scm?id=738aa0ca1d1b86286cf8f57620a50c4b093031b8'>gnu: sdcc: Fix typo in description.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-03-01 22:21:02 +0100'>2018-03-01</span></td><td><a href='/guix/commit/gnu/packages/sdcc.scm?id=1ff14bf2cdc698e1aa3418a3bbea023e80075e50'>gnu: sdcc: Update to 3.7.0.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2016-10-30 01:03:09 +0200'>2016-10-30</span></td><td><a href='/guix/commit/gnu/packages/sdcc.scm?id=225d6c049ea36724f80db44f0c4f73b0b740978d'>gnu: sdcc: Enable ucsim.</a><span class='msg-avail'>...</span></td><td>David Craven</td></tr>
<tr><td><span title='2016-09-28 12:40:12 +0200'>2016-09-28</span></td><td><a href='/guix/commit/gnu/packages/sdcc.scm?id=33619c3ae00f25af7fac325914fc47ee734d8f16'>gnu: Add sdcc.</a><span class='msg-avail'>...</span></td><td>David Craven</td></tr>
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