reverse returns None

stack/erp5.cfg

@@ -274,7 +274,8 @@ initialization =
   import Zope2
   os.environ['SOFTWARE_HOME'] = os.path.abspath(os.path.dirname(os.path.dirname(Zope2.__file__)))
   os.environ['ZOPE_SCRIPTS'] = ''
-  sys.path[0:0] = ['/'.join(['''${buildout:parts-directory}''', x]) for x in '''${erp5_repository_list:repository_id_list}'''.split()].reverse()
+  repository_id_list = reversed('''${erp5_repository_list:repository_id_list}'''.split())
+  sys.path[0:0] = ['/'.join(['''${buildout:parts-directory}''', x]) for x in repository_id_list.split()]
 
 [instance-recipe-egg]
 recipe = zc.recipe.egg