diff --git a/CHANGELOG.md b/CHANGELOG.md
index 525ddd793b52..17e27fabd77b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,7 +15,7 @@
 
 ### Performance
 
-- `[*]` [**BREAKING**] Bundle all of Jest's modules into `index.js` ([#12348](https://github.com/jestjs/jest/pull/12348))
+- `[*]` [**BREAKING**] Bundle all of Jest's modules into `index.js` ([#12348](https://github.com/jestjs/jest/pull/12348) & [#14550](https://github.com/jestjs/jest/pull/14550))
 
 ### Chore & Maintenance
 
diff --git a/scripts/bundleTs.mjs b/scripts/bundleTs.mjs
index 36460c8406a2..0ffeb4f5bc4c 100644
--- a/scripts/bundleTs.mjs
+++ b/scripts/bundleTs.mjs
@@ -14,18 +14,19 @@ import {
   ExtractorConfig,
 } from '@microsoft/api-extractor';
 import chalk from 'chalk';
+import {glob} from 'glob';
 import fs from 'graceful-fs';
-import {sync as pkgDir} from 'pkg-dir';
+import pkgDir from 'pkg-dir';
 import prettier from 'prettier';
 import {rimraf} from 'rimraf';
 import {copyrightSnippet, getPackages} from './buildUtils.mjs';
 
-const prettierConfig = prettier.resolveConfig.sync(
+const prettierConfig = await prettier.resolveConfig(
   fileURLToPath(import.meta.url).replace(/\.js$/, '.d.ts'),
 );
 
 const require = createRequire(import.meta.url);
-const typescriptCompilerFolder = pkgDir(require.resolve('typescript'));
+const typescriptCompilerFolder = await pkgDir(require.resolve('typescript'));
 
 const typesNodeReferenceDirective = '/// <reference types="node" />';
 
@@ -156,17 +157,39 @@ await Promise.all(
 
     let definitionFile = await fs.promises.readFile(filepath, 'utf8');
 
-    rimraf.sync(path.resolve(packageDir, 'build/**/*.d.ts'), {glob: true});
-    fs.rmSync(path.resolve(packageDir, 'dist/'), {
+    await rimraf(path.resolve(packageDir, 'build/**/*.d.ts'), {glob: true});
+    await fs.promises.rm(path.resolve(packageDir, 'dist/'), {
       force: true,
       recursive: true,
     });
     // this is invalid now, so remove it to not confuse `tsc`
-    fs.rmSync(path.resolve(packageDir, 'tsconfig.tsbuildinfo'), {
+    await fs.promises.rm(path.resolve(packageDir, 'tsconfig.tsbuildinfo'), {
       force: true,
       recursive: true,
     });
 
+    const dirsInBuild = await glob('**/', {
+      cwd: path.resolve(packageDir, 'build'),
+    });
+
+    await Promise.all(
+      dirsInBuild
+        .filter(dir => dir !== '.')
+        // reverse to delete deep directories first
+        .reverse()
+        .map(async dir => {
+          const dirToDelete = path.resolve(packageDir, 'build', dir);
+          try {
+            await fs.promises.rmdir(dirToDelete);
+          } catch (error) {
+            // e.g. `jest-jasmine2/build/jasmine` is not empty - ignore those errors
+            if (error.code !== 'ENOTEMPTY') {
+              throw error;
+            }
+          }
+        }),
+    );
+
     definitionFile = definitionFile.replace(/\r\n/g, '\n');
 
     const hasNodeTypesReference = definitionFile.includes(