how to fix dh_testdir error?

[Charlie Zender <zender@uci.edu>]

Hi,

In building the newest deb for the Debian nco package
using DIST=sid pbuilder on my Ubuntu 9.10 system, a new error
has crept in which I do not understand:

dh_testdir
make: dh_testdir: Command not found
make: *** [clean] Error 127
dpkg-buildpackage: failure: fakeroot debian/rules clean gave error exit
status 2

This seems to imply that something about the dependency
of nco on the debhelper package is misconfigured.
The nco control file does specify debhelper:

Build-Depends: debhelper (>= 5), antlr, bison, flex, gsl-bin,
libgsl0-dev, libantlr-dev, netcdf-bin, libnetcdf-dev, texinfo

as can be seen in the nco debian directory viewable at

http://nco.cvs.sf.net/nco/nco/debian

The dh_testdir error did not occur the last time I
built the package, in January.

Any suggestions?
Charlie
-- 
Charlie Zender, Department of Earth System Science
University of California, Irvine (949) 891-2429 :)