Can not build network-manager from git with debian squeeze

[toabctl <toabctl googlemail com>]

Hi,

i tried to build the latest git sources and got the following error:

### BEGIN ###
$ ./autogen.sh
...
...
checking Linux Wireless Extensions >= 18... no
configure: error: wireless-tools library and development headers >= 28pre9 not installed or not functional
### END ###

but:
$ dpkg -l|grep wireless-tools
ii  wireless-tools                        30~pre9-4                  Tools for manipulating Linux Wireless Extensions


so wireless-tools are version 30.

Any idea?

Cheers,
Tom