unauthenticated packages while creating wheezy iso

[Romain Failliot <romain.failliot@gmail.com>]

Hi!

I'm trying to build a live hybrid-iso of debian wheezy.
My command line is:
lb config noauto                            \
    --clean                                 \
    --apt apt                              \
    --distribution wheezy            \
    --repositories live.debian.net            \
    --debian-installer live           \
    --debian-installer-gui true   \
    --debian-installer-distribution "daily" \
    --packages-list gnome-desktop       \
    --bootappend-live "locales=fr_FR.UTF-8 keyboard-layouts=fr"

And i get this after half an hour:
    WARNING: The following packages cannot be authenticated!
      live-boot-initramfs-tools live-boot live-tools

if i relaunch lb build, i get this:
Package `gdm' is not installed and no info is available.
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
/usr/sbin/dpkg-reconfigure: gdm is not installed

There must be something i do wrong, but i can't see what :/
I'm on ubuntu 11.04 with live-build 2.0.12

Thanks,
Creak