diff -ur -x importlib.h /home/lemburg/egenix/projects/PyRun/Python-3.4.1/Lib/importlib/_bootstrap.py ./Lib/importlib/_bootstrap.py
--- /home/lemburg/egenix/projects/PyRun/Python-3.4.1/Lib/importlib/_bootstrap.py	2014-05-19 07:19:38.000000000 +0200
+++ ./Lib/importlib/_bootstrap.py	2014-06-12 17:45:06.192649090 +0200
@@ -1335,6 +1335,10 @@
 
     @classmethod
     def find_spec(cls, fullname, path=None, target=None):
+        if fullname == '__main__':
+            # The main module will be loaded by the import.c loader
+            # and doesn't need to be loaded again.
+            return None
         if _imp.is_frozen(fullname):
             return spec_from_loader(fullname, cls, origin='frozen')
         else:
@@ -1347,6 +1351,10 @@
         This method is deprecated.  Use find_spec() instead.
 
         """
+        if fullname == '__main__':
+            # The main module will be loaded by the import.c loader
+            # and doesn't need to be loaded again.
+            return None
         return cls if _imp.is_frozen(fullname) else None
 
     @staticmethod