This buildbot has been failing for a long time (example failure https://buildbot.python.org/all/#/builders/40/builds/3291) since https://github.com/python/cpython/commit/4267c989e7fc6cd528e8a1d04a07fac5cca85ec7:

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FAIL: test_compile_dir_maxlevels (test.test_compileall.CompileallTestsWithSourceEpoch)
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Traceback (most recent call last):
  File "C:\buildbot.python.org\3.x.kloth-win64\build\lib\test\test_py_compile.py", line 30, in wrapper
    return fxn(*args, **kwargs)
  File "C:\buildbot.python.org\3.x.kloth-win64\build\lib\test\test_compileall.py", line 257, in test_compile_dir_maxlevels
    self.assertTrue(os.path.isfile(self.bc_path_long))
AssertionError: False is not true
======================================================================
FAIL: test_compile_dir_maxlevels (test.test_compileall.CompileallTestsWithoutSourceEpoch)
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Traceback (most recent call last):
  File "C:\buildbot.python.org\3.x.kloth-win64\build\lib\test\test_py_compile.py", line 20, in wrapper
    return fxn(*args, **kwargs)
  File "C:\buildbot.python.org\3.x.kloth-win64\build\lib\test\test_compileall.py", line 257, in test_compile_dir_maxlevels
    self.assertTrue(os.path.isfile(self.bc_path_long))
AssertionError: False is not true
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Can someone try to fix the error, otherwise we would  need to revert commit 4267c989e7fc6cd528e8a1d04a07fac5cca85ec7.