I am running the experimental test runner in our CI environment today. I'm getting an error after building a multi-platform pex:

File "/data/app/pay-jenkins/.pex/install/pantsbuild.pants-1.1.0_pre2_square_20160523_01-py2-none-any.whl.a554bd8bbf765e8a5a3ce0f329d85ee6d1ba33d3/pantsbuild.pants-1.1.0_pre2_square_20160523_01-py2-none-any.whl/pants/engine/storage.py", line 19, in <module>
    import lmdb
  File "/data/app/pay-jenkins/.pex/install/lmdb-0.89-cp27-cp27mu-linux_x86_64.whl.0bd0923bb24096bde901456895eaeccfed5af9c7/lmdb-0.89-cp27-cp27mu-linux_x86_64.whl/lmdb/__init__.py", line 40, in <module>
    from lmdb.cffi import *
  File "/data/app/pay-jenkins/.pex/install/lmdb-0.89-cp27-cp27mu-linux_x86_64.whl.0bd0923bb24096bde901456895eaeccfed5af9c7/lmdb-0.89-cp27-cp27mu-linux_x86_64.whl/lmdb/cffi.py", line 341, in <module>
    import cffi

Exception message: No module named cffi