diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -255,6 +255,7 @@
            if (not e.startswith(b'not trusting file')
                and not e.startswith(b'warning: Not importing')
                and not e.startswith(b'obsolete feature not enabled')
+               and not e.startswith(b'*** failed to import extension')
                and not e.startswith(b'devel-warn:'))]
     return b'\n'.join(b'  ' + e for e in err)