--- Python/setup.py
+++ Python/setup.py
@@ -217,6 +217,7 @@ class PyBuildExt(build_ext):
             if os.path.exists(newname):
                 os.remove(newname)
             os.rename(ext_filename, newname)
+            raise
 
             # XXX -- This relies on a Vile HACK in
             # distutils.command.build_ext.build_extension().  The