{
  "builders": [
    {
      "type": "amazon-ebs",
      "ami_name": "packer-test-shell-interpolate",
      "instance_type": "m1.small",
      "region": "us-east-1",
      "ssh_username": "ubuntu",
      "source_ami": "ami-0568456c",
      "force_deregister" : true,
      "tags": {
        "packer-test": "true"
      }
    }
  ],
  "provisioners": [
    {
      "type": "shell",
      "inline": [
        "echo {{ build `ID`}} > provisioner.{{ build `PackerRunUUID`}}.txt"
      ]
    },
    {
      "type": "file",
      "source": "provisioner.{{ build `PackerRunUUID`}}.txt",
      "destination": "provisioner.shell.{{ build `PackerRunUUID`}}.txt",
      "direction": "download"
    }
  ]
}