"make install" : Malformed conditional ($ != "no")

I try to install textproc/py-elementtree but:

preston:pkgsrc/textproc/py-elementtree % make install
make:
"../../lang/python/../../lang/python/extension.mk"
line 25: Malformed conditional ($ !=
"no")
make:
"../../lang/python/../../lang/python/extension.mk"
line 38: if-less endif
make:
"../../lang/python/../../lang/python/extension.mk"
line 38: Need an operator
make: Fatal errors encountered -- cannot continue

make: stopped in /usr/pkgsrc/textproc/py-elementtree

Indeed, checking /usr/pkgsrc/lang/python/extension.mk, I see
strange
things such as ".endif" without ".if":

*****************

.if $ != "no"
_PYSETUPINSTALLARGS+=   --root=${DESTDIR:Q}
.endif
PY_PATCHPLIST?=         yes
PYSETUPSUBDIR?=         #empty

do-build:
        (cd $/$ && $
$ $ 
         $ build $)

do-install:
        (cd $/$ && $
$ $ 
         $ "install"
$)
.endif

***************

NetBSD 3.0.1
pkg_comp-1.29       Build packages inside a chroot jail
pkg_install-20060720 Package management and administration
tools for pkgsrc

On Mon, Oct 09, 2006 at 09:57:29PM +0200,
 Stephane Bortzmeyer <stephanesources.org> wrote 
 a message of 35 lines which said:

> I try to install textproc/py-elementtree but:

cd /usr/pkgsrc
cvs update 
pushd pkgtools/pkg_install
make update
popd
pushd pkgtools/pkg_comp
make update

was apparently enough to solve the problem. So, apparently,
I have
somehow managed to have an inconsistent tree pkgsrc :-(