project.json

{
  "version":"7",
  "compilation":{
    "contracts_source_dirs": ["./contracts"],
    "import_remappings": []
  },
  "chains": {

    "horton": {
      "chain": {
        "class": "populus.chain.ExternalChain"
      },
      "web3": {
        "provider": {
          "class": "web3.providers.ipc.IPCProvider",
        "settings": {
          "ipc_path":"./chains/horton/chain_data/geth.ipc"
        }
       }
      },
      "contracts": {
        "backends": {
          "JSONFile": {"$ref": "contracts.backends.JSONFile"},
          "ProjectContracts": {
            "$ref": "contracts.backends.ProjectContracts"
          }
        }
      }
    },

    "ganache": {
        "chain": {
          "class": "populus.chain.ExternalChain"
        },
        "web3": {
          "provider": {
            "class": "web3.providers.rpc.HTTPProvider",
          "settings": {
            "endpoint_uri": "http://127.0.0.1:8545"
          }
         }
        },
        "contracts": {
          "backends": {
            "JSONFile": {"$ref": "contracts.backends.JSONFile"},
            "ProjectContracts": {
              "$ref": "contracts.backends.ProjectContracts"
            }
          }
        }
    }

  }
}