"OSError:dlopen(libSystem.dylib,6):找不到图像"(OS X + macports + Celery 3.1.7)

我刚刚通过pip(1.5)将celery更新到最新版本(3.1.7),但是我得到了一个致命的异常,我很快就会尝试导入该库.通过运行:

from celery import Celery 在shell中我得到:

File "", line 1, in 
  File "/Users/davidezanotti/CygoraPythonEnv/lib/python2.7/site-packages/celery/__init__.py", line 130, in 
    from .five import recreate_module
  File "/Users/davidezanotti/CygoraPythonEnv/lib/python2.7/site-packages/celery/five.py", line 51, in 
    from kombu.five import monotonic
  File "/Users/davidezanotti/CygoraPythonEnv/lib/python2.7/site-packages/kombu/five.py", line 47, in 
    libSystem = ctypes.CDLL('libSystem.dylib')
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 365, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: dlopen(libSystem.dylib, 6): image not found

我在OS X 10.8.5上使用带有VirtualEnv和macports的python 2.7.6

我明白问题是缺少底层依赖("libSystem.dylib"),但我不知道如何解决这个问题

(在/ usr/lib /下我可以在我的机器上找到libSystem.dylib)