diff --git a/apps/demos/utils/create-bundles/Angular/bundler.ts b/apps/demos/utils/create-bundles/Angular/bundler.ts
index ca2d8dbe953e..d5200fe4b708 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 +42,11 @@ 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, npmArgs] = isWin
+      ? ['cmd', ['/c', 'npm.cmd', 'run', 'build-angular', '--', getProjectNameByDemo(demo)]]
+      : ['npm', ['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 4101fe599c6e..6e0c47d661bc 100644
--- a/apps/demos/utils/ts-to-js-converter/converter.ts
+++ b/apps/demos/utils/ts-to-js-converter/converter.ts
@@ -78,15 +78,13 @@ const pipeSource = async (
   }));
 };
 
-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 [cmd, cmdArgs] = isWindows()
+    ? ['cmd', ['/c', 'tsc.cmd', ...args]]
+    : ['tsc', args];
+  const { stdout } = await promisify(cps.execFile)(cmd, cmdArgs, { cwd: directory });
+  return stdout;
+};
 
 const compile = async (resolve: PathResolvers, log: Logger) => {
   log.debug('compiling sources and unit tests');
@@ -109,7 +107,7 @@ 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) => {
@@ -140,6 +138,7 @@ const strip = async (resolve: PathResolvers, log: Logger) => {
   });
 };
 
+// eslint-disable-next-line require-await
 const replaceInFiles = async (filenamePatterns: string[], replacementCallback: (string) => string, resolvePath: (string) => string, log: Logger) => (
   Promise.all(
     filenamePatterns.map(async (pattern) => {