It runs on chroot just fine , however some one has to do the work to get it to work like easy debian .

if you just want a basic chroot :

extract the image on your pc .

use dd to get the image onto a partition on your sdcard ,

then check that partition for errors and resize the file system to fit the partition .

disconnect your n900 from pc and reboot if you have repartitioned the sdcard .

then mkdir mnt/bt5 and then mount /dev/mmcblk1pX /mnt/bt5
chroot /mnt/bt5

thats all .