diff --git a/npm/ng-packs/scripts/build.js b/npm/ng-packs/scripts/build.js
index dca954af42..beef97ca29 100644
--- a/npm/ng-packs/scripts/build.js
+++ b/npm/ng-packs/scripts/build.js
@@ -4,37 +4,15 @@ import fse from 'fs-extra';
 import program from 'commander';
 
 (async () => {
-  const { projects } = await fse.readJSON('../angular.json');
-  const projectNames = Object.keys(projects).filter(project => project !== 'dev-app');
-
-  const packageJson = await fse.readJSON('../package.json');
-
   program.option('-c, --noCommit', 'skip commit process', false);
+  program.option('-i, --noInstall', 'skip updating package.json and installation', false);
 
   program.parse(process.argv);
 
-  let npmPackageNames = [];
-  projectNames.forEach(project => {
-    // do not convert to async
-    const { name, dependencies = {}, peerDependencies = {} } = fse.readJSONSync(
-      `../packages/${project}/package.json`,
-    );
-    npmPackageNames.push(name);
-
-    packageJson.devDependencies = {
-      ...packageJson.devDependencies,
-      ...dependencies,
-      ...peerDependencies,
-    };
-  });
-
-  await fse.writeJSON('../package.json', packageJson, { spaces: 2 });
-
   try {
-    await execa('yarn', ['install', '--ignore-scripts'], {
-      stdout: 'inherit',
-      cwd: '../',
-    });
+    if (!program.noInstall) {
+      await execa('yarn', ['install-new-dependencies'], { stdout: 'inherit' });
+    }
 
     execa.sync(
       'yarn',
diff --git a/npm/ng-packs/scripts/install-new-dependencies.js b/npm/ng-packs/scripts/install-new-dependencies.js
new file mode 100644
index 0000000000..0579fb9d13
--- /dev/null
+++ b/npm/ng-packs/scripts/install-new-dependencies.js
@@ -0,0 +1,37 @@
+// ESM syntax is supported.
+import execa from 'execa';
+import fse from 'fs-extra';
+
+(async () => {
+  const { projects } = await fse.readJSON('../angular.json');
+  const projectNames = Object.keys(projects).filter(project => project !== 'dev-app');
+
+  const packageJson = await fse.readJSON('../package.json');
+
+  projectNames.forEach(project => {
+    // do not convert to async
+    const { dependencies = {}, peerDependencies = {} } = fse.readJSONSync(
+      `../packages/${project}/package.json`,
+    );
+
+    packageJson.devDependencies = {
+      ...packageJson.devDependencies,
+      ...dependencies,
+      ...peerDependencies,
+    };
+  });
+
+  await fse.writeJSON('../package.json', packageJson, { spaces: 2 });
+
+  try {
+    await execa('yarn', ['install', '--ignore-scripts'], {
+      stdout: 'inherit',
+      cwd: '../',
+    });
+  } catch (error) {
+    console.error(error.stderr);
+    process.exit(1);
+  }
+
+  process.exit(0);
+})();
diff --git a/npm/ng-packs/scripts/package.json b/npm/ng-packs/scripts/package.json
index 26dcb1d4a6..e7225409ff 100644
--- a/npm/ng-packs/scripts/package.json
+++ b/npm/ng-packs/scripts/package.json
@@ -6,6 +6,7 @@
   "modules": "[build.js, sync.js]",
   "scripts": {
     "build": "node -r esm build.js",
+    "install-new-dependencies": "node -r esm install-new-dependencies.js",
     "sync": "node -r esm sync.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },