setup.py develop doesn't work

For some reason
`python setup.py develop`
doesn't work for me. When invoking on a clean virtualenv (no `python setup.py install` previously)
`python -c "import jpype"`
gives
```
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named jpype
```
Does this work for you? How to get it working? I am pretty sure it did work for me in the past...