sfdx-project.json

{
  "packageDirectories": [
    {
      "path": "force-app",
      "default": true
    },
    {
      "path": "src/packaged",
      "package": "Your Package Name",
      "definitionFile": "config/default-scratch-def.json",
      "versionName": "Package Version Name",
      "versionNumber": "0.1.0.NEXT",
      "default": false,
      "dependencies": [
        {
          "package": "First Dependency",
          "versionNumber": "1.0.0.LATEST"
        },
        {
          "package": "Second Dependency",
          "versionNumber": "1.0.0.LATEST"
        }
      ]
    },
    {
      "path": "src/unpackaged",
      "default": false
    }
  ],
  "namespace": "",
  "sfdcLoginUrl": "https://login.salesforce.com",
  "sourceApiVersion": "61.0",
  "packageAliases": {
    "Package Name": "0HoXXXXXXXXXXXXXXX",
    "First Dependency": "0HoXXXXXXXXXXXXXXX",
    "Second Dependency": "0HoXXXXXXXXXXXXXXX",
    "First Dependency Package Version": "04tXXXXXXXXXXXXXXX",
    "Second Dependency Package Version": "04tXXXXXXXXXXXXXXX"
  },
  "sourceBehaviorOptions": [
    "decomposeCustomLabelsBeta2"
  ]
}