Pyrex not found

[Adam Dershowitz]

I just installed py26-pyrex.  The contents includes  /opt/local/Library/Frameworks/Python.framework/Versions/2.6/bin/pyrexc
However, if I try to run it directly this is not found.  I am trying to install a python library that requires it, but that library is also not finding it.  So if I try to do: python setup.py install, I get:
sh: pyrexc: command not found

I just confirmed that python26 is active.  Is there something else odd about the pyrex port in terms of the path?

--Adam