docker run --rm -v ${PWD}:/build -v ${PWD}/packer_cache:/build/packer_cache -v ${PWD}/output:/build/output -v /dev:/dev --privileged jangrewe/packer-arm:latest build my-image.json

{
  "variables": {
    "img_mount_path": "{{ env `PWD` }}/mnt",
  },
  "builders": [
    {
      "name": "my-image",
      "type": "arm-image",
      "iso_url": "https://downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-2019-09-30/2019-09-26-raspbian-buster-lite.zip",
      "iso_checksum_type": "sha256",
      "iso_checksum": "a50237c2f718bd8d806b96df5b9d2174ce8b789eda1f03434ed2213bbca6c6ff",
      "mount_path": "{{ user `img_mount_path` }}",
      "output_directory": "output"
    }
  ],
  "provisioners": [
    {
      "type": "shell-local",
      "inline": [
        "sudo -E ANSIBLE_FORCE_COLOR=1 PYTHONUNBUFFERED=1 ansible-playbook -i '{{ user `img_mount_path` }}', -c chroot ./my-image.yml"
      ]
    }
  ]
}