Just a note for upstream fix. On mac os x 10.7.3 with python 2.7.1,
pip install pyev
fails with a permissions error on configure. The fix is:
chmod 755 configure
This will prevent pyev from installing cleanly, and subsequently diesel from running.
I've also seen this fail in exactly the same way with a virtualenv on fedora core 16 linux.
This workaround also works with Python 2.6x on OSX 10.7.
This issue seems to be fixed with pyev==0.9.0