iso build fail: lang pack apt conflict

[henczati]

System: Lubuntu xenial 16.04.1 i386 daily-live (built @ 2016-09-29T16:45) from http://cdimage.ubuntu.com/lubuntu/xenial/daily-live/
Same source iso.
Installed uck 2.4.7-0ubuntu2 from `http://archive.ubuntu.com/ubuntu xenial/universe i386 Packages`.
/dev/mapper/uck_vg-data is empty 7.3G ext2 on lvm2 logical volume (7.0G free).
Then:
```bash
sudo mount -o dev,suid,exec /dev/mapper/uck_vg-data /mnt
sudo mkdir /mnt/ucktmp
sudo chown $USER:$USER /mnt/ucktmp/
sudo mount --bind /mnt/ucktmp/ $HOME/tmp
uck-gui
```
Chose same langs at all lang prompts, chose manual modifications, removing Windows stuff, hybrid (CD/USB) iso.
`en` was set as the default lang.

ISO build fails on lang pack installation.

In $HOME/tmp/build.log :

[...]
The following packages have unmet dependencies:
 language-pack-touch-en : Conflicts: language-pack-en but 1:16.04+20160627 is to be ins
talled
E: Unable to correct problems, you have held broken packages.
apt-get install language-pack-en language-pack-en-base language-pack-touch-en failed, error=100
[...]

Same goes for any other language selected for install, all if multiple selected.

[henczati (henczati)]

Full build.log (for single lang `en`) in attachment.