# package Build an Angular library Builder properties can be configured in workspace.json when defining the builder, or when invoking it. Read more about how to use builders and the CLI here: https://nx.dev/react/guides/cli. ## Properties ### project Type: `string` The file path for the ng-packagr configuration file, relative to the current workspace. ### tsConfig Type: `string` The full path for the TypeScript configuration file, relative to the current workspace. ### watch Default: `false` Type: `boolean` Run build when files change.