diff --git a/apps/demos/utils/create-bundles/Angular/bundler.ts b/apps/demos/utils/create-bundles/Angular/bundler.ts
index ca2d8dbe953e..1b76b9cea5fa 100644
--- a/apps/demos/utils/create-bundles/Angular/bundler.ts
+++ b/apps/demos/utils/create-bundles/Angular/bundler.ts
@@ -1,4 +1,4 @@
-import { exec } from 'child_process';
+import { spawn } from 'child_process';
 import { BuildOptions } from 'esbuild';
 import { existsSync, mkdirSync, removeSync } from 'fs-extra';
 import { Demo, Framework } from '../helper/types';
@@ -42,8 +42,10 @@ export default class AngularBundler implements Bundler {
 
     createDemoLayout(demo, this.framework);
 
-    const ngBuildCommand = `npm run build-angular -- ${getProjectNameByDemo(demo)}`;
-    const ngBuildProcess = exec(ngBuildCommand);
+    const isWin = process.platform === 'win32';
+    const npmCmd = isWin ? 'npm.cmd' : 'npm';
+    const npmArgs = ['run', 'build-angular', '--', getProjectNameByDemo(demo)];
+    const ngBuildProcess = spawn(npmCmd, npmArgs);
     ngBuildProcess.stdout.on('data', (data) => {
       console.log(`stdout: ${data}`);
     });
diff --git a/apps/demos/utils/ts-to-js-converter/converter.ts b/apps/demos/utils/ts-to-js-converter/converter.ts
index b56d1bf6ff4a..cd7319aacb69 100644
--- a/apps/demos/utils/ts-to-js-converter/converter.ts
+++ b/apps/demos/utils/ts-to-js-converter/converter.ts
@@ -78,16 +78,15 @@ const pipeSource = async (
   }));
 };
 
-// eslint-disable-next-line require-await
-const execTsc = async (directory: string, args: string): Promise<string> => new Promise((resolve, reject) => {
-  cps.exec(`tsc ${args}`, (error, stdout, stderr) => {
-    if (error != null) {
-      // eslint-disable-next-line prefer-promise-reject-errors
-      return reject(`${error}\n${stderr}\n${stdout}`);
-    }
-    return resolve(stdout);
-  });
-});
+const execTsc = async (directory: string, args: string[]): Promise<string> => {
+  const tscScript = require.resolve('typescript/bin/tsc');
+  const { stdout } = await promisify(cps.execFile)(
+    process.execPath,
+    [tscScript, ...args],
+    { cwd: directory },
+  );
+  return stdout;
+};
 
 const compile = async (resolve: PathResolvers, log: Logger) => {
   log.debug('compiling sources and unit tests');
@@ -110,7 +109,7 @@ const compile = async (resolve: PathResolvers, log: Logger) => {
     ),
   );
 
-  await execTsc(resolve.source('./'), `--build ${tsconfigFile}`);
+  await execTsc(resolve.source('./'), ['--build', tsconfigFile]);
 };
 
 const copyAssets = async (resolve: PathResolvers, log: Logger) => {