diff --git a/goldens/public-api/angular_devkit/build_angular/index.md b/goldens/public-api/angular_devkit/build_angular/index.md
index 19a46f29ecdf..11cd33cc089a 100644
--- a/goldens/public-api/angular_devkit/build_angular/index.md
+++ b/goldens/public-api/angular_devkit/build_angular/index.md
@@ -303,6 +303,7 @@ export type KarmaConfigOptions = ConfigOptions & {
 
 // @public
 export interface NgPackagrBuilderOptions {
+    poll?: number;
     project: string;
     tsConfig?: string;
     watch?: boolean;
diff --git a/packages/angular/cli/src/commands/build/long-description.md b/packages/angular/cli/src/commands/build/long-description.md
index e369ff8d2d0c..b2c14d8f23fe 100644
--- a/packages/angular/cli/src/commands/build/long-description.md
+++ b/packages/angular/cli/src/commands/build/long-description.md
@@ -1,5 +1,5 @@
 The command can be used to build a project of type "application" or "library".
-When used to build a library, a different builder is invoked, and only the `ts-config`, `configuration`, and `watch` options are applied.
+When used to build a library, a different builder is invoked, and only the `ts-config`, `configuration`, `poll` and `watch` options are applied.
 All other options apply only to building applications.
 
 The application builder uses the [esbuild](https://esbuild.github.io/) build tool, with default configuration options specified in the workspace configuration file (`angular.json`) or with a named alternative configuration.
diff --git a/packages/angular_devkit/build_angular/src/builders/ng-packagr/index.ts b/packages/angular_devkit/build_angular/src/builders/ng-packagr/index.ts
index eeb945a68ae1..73671b5f622b 100644
--- a/packages/angular_devkit/build_angular/src/builders/ng-packagr/index.ts
+++ b/packages/angular_devkit/build_angular/src/builders/ng-packagr/index.ts
@@ -47,6 +47,7 @@ export function execute(
 
       const ngPackagrOptions = {
         cacheEnabled,
+        poll: options.poll,
         cacheDirectory: join(cacheDirectory, 'ng-packagr'),
       };
 
diff --git a/packages/angular_devkit/build_angular/src/builders/ng-packagr/schema.json b/packages/angular_devkit/build_angular/src/builders/ng-packagr/schema.json
index 9fd60637cb00..da76255f092a 100644
--- a/packages/angular_devkit/build_angular/src/builders/ng-packagr/schema.json
+++ b/packages/angular_devkit/build_angular/src/builders/ng-packagr/schema.json
@@ -16,6 +16,10 @@
       "type": "boolean",
       "description": "Run build when files change.",
       "default": false
+    },
+    "poll": {
+      "type": "number",
+      "description": "Enable and define the file watching poll time period in milliseconds."
     }
   },
   "additionalProperties": false,