template.json

{
  "builders": [{
    "type": "virtualbox-iso",
    "virtualbox_version_file": ".vbox_version",
    "headless": false,

    "guest_os_type": "Debian",
    "guest_additions_mode": "disable",

    "disk_size": 40960,

    "iso_url": "http://cdimage.debian.org/debian-cd/7.8.0/i386/iso-cd/debian-7.8.0-i386-netinst.iso",
    "iso_checksum_type": "sha512",
    "iso_checksum": "c22be055c31fdd9a93afd850f47776e91e72f1deb697061850338e1245f4b6b1934c3a2a041e1002b2c103f5fe0d52f6ef26d12c528b99d4ffdd7fc67b4a3de1",

    "http_directory": "http",

    "boot_command": ["<esc><wait>auto url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/preseed.cfg <enter><wait>"],

    "ssh_username": "vagrant",
    "ssh_password": "vagrant",
    "ssh_port": 22,
    "ssh_wait_timeout": "10000s",

    "vboxmanage": [
      ["modifyvm", "{{.Name}}", "--memory", "1024"],
      ["modifyvm", "{{.Name}}", "--cpus", "1"],
      ["modifyvm", "{{.Name}}", "--pae", "on"]
    ],

    "shutdown_command": "echo 'vagrant'|sudo -S /sbin/halt -h -p"
  }],
  "post-processors": [{
    "output": "build/yesod.box",
    "keep_input_artifact": true,
    "type": "vagrant"
  }],
  "provisioners": [{
    "type": "shell",
    "execute_command": "echo 'vagrant' | {{.Vars}} sudo -S -E bash '{{.Path}}'",
    "scripts": [
      "scripts/vagrant.sh",
      "scripts/yesod.sh",
      "scripts/compact.sh"
    ]
  }]
}