mkdir disk
cd disk
git clone https://git.openstack.org/openstack/diskimage-builder
git clone https://git.openstack.org/openstack/dib-utils
pip3 install virtualenv
virtualenv dib-env
source dib-env/bin/activate
cd diskimage-builder
pip3 --default-time=100 install .
cd ../dib-utils
python setup.py install