platform/packages/platform-rig/profiles/model/config/rush-project.json

{
  "incrementalBuildIgnoredGlobs": [
    "temp/**", 
    "lib/**", 
    "coverage/**",
    ".build/**"
  ],
  "disableBuildCacheForProject": false,

  "operationSettings": [
    {
      "operationName": "build",
      "outputFolderNames": ["lib", ".build"]
    },
    {
      "operationName": "build:watch",
      "outputFolderNames": ["lib", ".build"]
    }
  ]
}