I use a minimal chroot (tazwok + slitaz-toolchain) to verify build_deps of receipts. I build the chroot in my home USB in live session to save ram. I also use a script to remove all packages installed during cooking at exit, because I want to keep a minimal environnment for testing build_deps.

mkdir /home/chroot
# You can mount a device to /home/chroot
# with mountbox or mount
tazpkg get-install busybox --root="/home/chroot"
echo "No" | tazpkg get-install bash --root="/home/chroot"
tazpkg get-install slitaz-toolchain --root="/home/chroot"
tazpkg get-install tazwok --root="/home/chroot"
tazpkg get-install tazpkg --root="/home/chroot"
tazpkg get-install lzma --root="/home/chroot"
mkdir /home/chroot/home/slitaz

Note : you can keep theses lines in a script file if needed. Just add #!/bin/sh in first line and make executable with :

chmod +x script_file

cat > /home/chroot/chroot_script.sh << "EOF"
#!/bin/sh
/bin/sh --login
for pkg in $(cat /var/log/tazpkg.log | grep -v Removed | sed 's/\(.*\)\(- Installed - \)\(.*\)\( (.*\)/\3/'); do
	echo "y" | tazpkg remove $pkg
done
rm /var/log/tazpkg.log

EOF
chmod +x "/home/chroot/chroot_script.sh"

Note: /bin/sh –login log you in the chrooted environnment. The commands after that line auto-remove packages added when cooking at exit. You can hack this file to execute various automated actions when entering and exiting chroot.

cat > /usr/bin/tazchroot << "EOF"
#!/bin/sh
cat /etc/resolv.conf > /home/chroot/etc/resolv.conf
if [ ! -d "/home/chroot/proc/1" ]; then
	echo "Mounting virtual filesystems..."
	mount -t proc proc /home/chroot/proc
	mount -t sysfs sysfs /home/chroot/sys
	mount -t devpts devpts /home/chroot/dev/pts
	mount -t tmpfs shm /home/chroot/dev/shm
	mount /home/slitaz /home/chroot/home/slitaz
	chroot /home/chroot ./chroot_script.sh
	until [ "$ps" = "2" ]; do
		echo "Waiting for the end of all other chroot process..."
		ps=$(ps | grep `basename $0` | grep -v grep | grep -v basename | wc -l)
		sleep 1
	done
	umount /home/chroot/home/slitaz
	umount /home/chroot/dev/shm
	umount /home/chroot/dev/pts
	umount /home/chroot/sys
	umount /home/chroot/proc
else
	echo "The chroot is already mounted"
fi
EOF
chmod +x /usr/bin/tachroot

Note : This script mount /home/slitaz in you're chroot, so you can use tazwok as if it is on you're normal environnment.