iipimage-server: unknown substitution variable ${shlibs:Depends}

[Mathieu Malaterre <malat@debian.org>]

hi,

for some reason, if I recompile iipimage from a sid chroot I keep
getting a warning:

[...]
dpkg-gencontrol: warning: Depends field of package iipimage-server:
unknown substitution variable ${shlibs:Depends}
[...]

It did worked well in the past. Now even libc is not part of the
Depends fields. Does anyone see anything wrong in the iipimage package
? Thanks.

Steps:

$ schroot -c sid
$ apt-get source iipimage
$ cd iipimage-0.9.9
$ dpkg-buildpackage -rfakeroot -us -uc
[...]