embark/demo/config/contracts.json

{
  "default": {
    "gas": "auto",
    "contracts": {
      "token": {
        "address": "0x123",
        "args": [
          100
        ]
      },
      "SimpleStorage": {
        "args": [
          100,
          "$token"
        ]
      },
      "SimpleStorage2": {
        "instanceOf": "SimpleStorage",
        "args": [
          100,
          "$token"
        ]
      }
    }
  }
}