[Discuss-gnuradio] gnuradio Python on ubuntu 9.10 install problems

[dave k]

checking for python... /usr/bin/python
checking for python version... 2.6
checking for python platform... linux2
checking for python script directory... ${prefix}/lib/python2.6/dist-packages
checking for python extension module directory... ${exec_prefix}/lib/python2.6/dist-packages
checking for Python include path... /usr/include/python2.6
checking Python.h usability... no
checking Python.h presence... no
checking for Python.h... no
configure: error: cannot find usable Python headers
address@hidden:~/gnuradio$

but

address@hidden:~/gnuradio$ ls -la /usr/include/python2.6 | grep Python.h
-rw-r--r--  1 root root  4384 2009-10-19 23:40 Python.h

any ideas? i think i missed something but not sure....