mkdir /tmp/zero_builder
cd /tmp/zero_builder
git clone https://github.com/hyphop/miZy-builder

cd /tmp/zero_builder/miZy-builder
./miZy_builder_vm_generate yes			  # debian stable (stretch) # not tested
# or run  via sudo, becouse DEBOOTSTRAP need root
sudo ./miZy_builder_vm_generate yes 
#
ver=xenial ./miZy_builder_vm_generate  yes  # ubuntu xenial # miZy-openwrt-sdk ok
ver=jessie ./miZy_builder_vm_generate  yes  # debian jessie # miZy-openwrt-sdk ok
ver=wheezy ./miZy_builder_vm_generate  yes  # debian wheezy # 

cd /tmp/zero_builder/miZy-builder
./miZy_builder_vm start
./miZy_builder_vm start run=tar=scripts
./miZy_builder_vm start run=http://...

cd /usr/share/debootstrap/scripts
ln -s gutsy xenial
ln -s sid jessie

mem=4G ./miZy_builder_vm start

password=1234 ./miZy_builder_vm start

console=no password=1234 ./miZy_builder_vm start

wget http://raw.githubusercontent.com/hyphop/miZy-builder/master/make_it_easy -O- | sh -

qemu-img create -f qcow2 miZyBldr.ovl 1G

./miZy_builder_vm start ovl=

qemu-img create -f qcow2 mizy.img 8G

./miZy_builder_vm start disk=mizy.img

mkfs.ext4 /dev/vdb
e2label /dev/vdb mizy_build
blkid 
/dev/vda: TYPE="squashfs"
/dev/vdb: LABEL="mizy_build" UUID="..." TYPE="ext4"
mkdir /tmp/zero_builder
mount /dev/vdb /tmp/zero_builder
df | grep zero
/dev/vdb         8125880  18420   7671648   1% /tmp/zero_builder
cd /tmp/zero_builder
...

ssh root@vvv sh < ./scripts/miZy.build.script

cd /tmp/zero_builder/miZy-builder
./miZy_builder_vm_image get
./miZy_builder_vm start

root@miZyBldr:~# cat ~/.ssh/authorized_keys 
## put fixed authorized_keys there
## yes is empty there
## get from ./miZy_builder_vm_generate.pub
## miZy_builder_vm_generate.pub
## yes is empty there

ssh-copy-id -i ~/.ssh/id_rsa.pub root@vvv