使用'pip install<<package>'引发平台验证错误（error）

Question

尝试使用pip安装cvxopt包会生成以下错误消息-如何避免这种情况？任何其他包也会失败，并显示相同的消息：

raise ffiplatform.VerificationError(error)
cffi.ffiplatform.VerificationError: importing '//anaconda/lib/python2.7/site-packages/cryptography/_Cryptography_cffi_4ed9e37dx4000d087.so': dlopen(//anaconda/lib/python2.7/site-packages/cryptography/_Cryptography_cffi_4ed9e37dx4000d087.so, 2): Library not loaded: @loader_path/../../../libcrypto.1.0.0.dylib
  Referenced from: //anaconda/lib/python2.7/site-packages/cryptography/_Cryptography_cffi_4ed9e37dx4000d087.so
  Reason: image not found