https://www.packer.io/docs/other/debugging.html https://www.packer.io/docs/builders/virtualbox-iso.html https://www.packer.io/docs/post-processors/vagrant.html
https://www.vagrantup.com/docs/other/debugging.html
https://github.com/PowerShell/Win32-OpenSSH/wiki/Install-Win32-OpenSSH
export PACKER_LOG=1 make clean-vagrant-dir clean-vagrant-boxes