build doesn't take account of backports repo for iceweasel

["Stefan" <lists@nosolution.doesntexist.org>]

Hi,

I tried to build a live-system with newer packages from squeeze-backports, and  
run into a strange behaviour.

I announced the repos 
deb http://backports.debian.org/debian-backports squeeze-backports main
deb http://mozilla.debian.net/ squeeze-backports iceweasel-release

in config/chroot_sources
and config/binary_sources

in config/chroot_apt and config/binary_apt I put a preferences-file
with apt pinning:

Package: *                                                                                                                                                   
Pin: release a=squeeze-backports                                                                                                                             
Pin-Priority: 1000

Now building the image.

While other packages from backports (including kernel) are included in the new 
image, iceweasel is not. But all settings inside the image seem to be ok. So 
after booting the image, a apt-get install iceweasel upgrades the browser 
correctly.

But now the strange thing: Inside the chroot
:/# dpkg -l |grep iceweasel
ii  iceweasel                                 7.0.1-4~bpo60+1                        

there is also the right version installed.

And if I make

lb clean --binary
lb build 

and build without cleaning the chroot the right package is inside the image.

The logging of the build prozess (greped by iceweasel) says:
:/# cat binary.log |grep iceweasel

~~~~~~~~~~~~~~~~
Del iceweasel 7.0.1-4~bpo60+1 [1556 kB]
  hplip-cups{a} hplip-data{a} iceweasel kbd{a} kerneloops 
  hplip-cups{a} hplip-data{a} iceweasel kbd{a} kerneloops 
Selecting previously deselected package iceweasel.
Unpacking iceweasel (from .../iceweasel_3.5.16-10_i386.deb) ...
Adding 'diversion of /usr/bin/firefox to /usr/bin/firefox.real by iceweasel'
Setting up iceweasel (3.5.16-10) ...
update-alternatives: using /usr/bin/iceweasel to provide /usr/bin/x-www-
browser (x-www-browser) in auto mode.
update-alternatives: using /usr/bin/iceweasel to provide /usr/bin/gnome-www-
browser (gnome-www-browser) in auto mode.
Del iceweasel 7.0.1-4~bpo60+1 [1556 kB]
iceweasel is already the newest version.
Del iceweasel 7.0.1-4~bpo60+1 [1556 kB]
  icedove-l10n-de iceweasel-l10n-de
Selecting previously deselected package iceweasel-l10n-de.
Unpacking iceweasel-l10n-de (from .../iceweasel-l10n-
de_1%3a3.5.15+debian-1_all.deb) ...
Setting up iceweasel-l10n-de (1:3.5.15+debian-1) ...
Del iceweasel 7.0.1-4~bpo60+1 [1556 kB]
Ign http://mozilla.debian.net/ squeeze-backports/iceweasel-release 
Translation-en
Ign http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
Get:15 http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages [7560 B]
Del iceweasel 7.0.1-4~bpo60+1 [1556 kB]
Ign http://mozilla.debian.net/ squeeze-backports/iceweasel-release 
Translation-en
Get:5 http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages [7560 B]
Ign http://mozilla.debian.net/ squeeze-backports/iceweasel-release 
Translation-en
Ign http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
Hit http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
  iceweasel libavcodec52 libavformat52 libpostproc51 libswscale0 libva1
  iceweasel-l10n-de
  iceweasel libavcodec52 libavformat52 libpostproc51 libswscale0 libva1
Removing iceweasel-l10n-de ...
Preparing to replace iceweasel 3.5.16-10 (using 
.../iceweasel_7.0.1-4~bpo60+1_i386.deb) ...
Leaving 'diversion of /usr/bin/firefox to /usr/bin/firefox.real by iceweasel'
Unpacking replacement iceweasel ...
Setting up iceweasel (7.0.1-4~bpo60+1) ...
Installing new version of config file /etc/iceweasel/profile/bookmarks.html 
...
Ign http://mozilla.debian.net/ squeeze-backports/iceweasel-release 
Translation-en
Ign http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
Hit http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
Ign http://mozilla.debian.net/ squeeze-backports/iceweasel-release 
Translation-en
Ign http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
Hit http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
Ign http://mozilla.debian.net/ squeeze-backports/iceweasel-release 
Translation-en
Ign http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
Hit http://mozilla.debian.net squeeze-backports/iceweasel-release i386 
Packages
~~~~~~~~~~~~~

conspicuous is, 
at the Beginning:

Del iceweasel 7.0.1-4~bpo60+1 [1556 kB]
Selecting previously deselected package iceweasel.
Unpacking iceweasel (from .../iceweasel_3.5.16-10_i386.deb) ...

and afterwords:

Preparing to replace iceweasel 3.5.16-10 (using 
.../iceweasel_7.0.1-4~bpo60+1_i386.deb) ...
Leaving 'diversion of /usr/bin/firefox to /usr/bin/firefox.real by iceweasel'
Unpacking replacement iceweasel ...
Setting up iceweasel (7.0.1-4~bpo60+1) ...
Installing new version of config file /etc/iceweasel/profile/bookmarks.html

Has anybody an Idea?

cheers
Stefan