Running Python 2.6.4, Eclipse SDK Version: 3.5.2 Build id: M20100211-1343, Pydev 2.2.2.2011082312

I have set the PYTHONPATH environment variable.
Now when I set a new Python interpreter in Pydev, I get a list of paths.
This list includes the paths I have set in the PYTHONPATH environment variable.
Problem is that these paths are not checked.

How to get Pydev to include the paths in PYTHONPATH automatically?