{
    "builders": [{
        "type": "virtualbox-iso",
        "output_directory": "output-win2016",
        "iso_url": "{{user `iso_url`}}",
        "iso_checksum_type": "{{user `iso_checksum_type`}}",
        "iso_checksum": "{{user `iso_checksum`}}",
        "guest_additions_mode": "upload",
        "guest_additions_path": "C:/users/vagrant/VBoxGuestAdditions.iso",
        "hard_drive_interface": "sata",
        "headless": false,
        "boot_wait": "{{user `boot_wait`}}",
        "communicator": "{{user `winrm`}}",
        "winrm_username": "{{user `winrm_username`}}",
        "winrm_password": "{{user `winrm_password`}}",
        "winrm_timeout": "{{user `winrm_timeout`}}",
        "shutdown_command": "{{user `shutdown_command`}}",
        "shutdown_timeout": "{{user `shutdown_timeout`}}",
        "guest_os_type": "Windows2016_64",
        "disk_size": "{{user `disk_size`}}"
    }],
    "provisioners": [{
        "type": "powershell"
    }],
    "variables": {
        "iso_url": "file:////Users/me/somefile.iso",
        "iso_checksum_type": "none",
        "autounattend": "./answer_files/2016/Autounattend.xml",
        "sysprep_autounattend": "./answer_files/2016/sysprep_Autounattend.xml",
        "boot_wait": "2m",
        "shutdown_command": "A:/packer_shutdown.bat",
        "shutdown_timeout": "2h",
        "communicator": "winrm",
        "winrm_username": "vagrant",
        "winrm_password": "vagrant",
        "winrm_timeout": "2h",
        "headless": "false",
        "disk_size": "40000"
    }
}