src/product/partitions_template.json

{
  "hardware_revision": "workstation",
  "bootloader_partitions": [
    {
      "name": "bootloader",
      "image": "${fuchsia.esp.blk}",
      "type": "esp"
    }
  ],
  "partitions": [
    {
      "name": "zircon-a",
      "type": "ZBI",
      "slot": "A"
    },
    {
      "name": "zircon-a",
      "type": "VBMeta",
      "slot": "A"
    },
    {
      "name": "blk",
      "type": "FVM",
      "slot": "A"
    }
  ]
}