diff --git a/packages/angular_devkit/build_angular/src/tools/esbuild/commonjs-checker.ts b/packages/angular_devkit/build_angular/src/tools/esbuild/commonjs-checker.ts
index 102e1060198d..4dd44ba4caaf 100644
--- a/packages/angular_devkit/build_angular/src/tools/esbuild/commonjs-checker.ts
+++ b/packages/angular_devkit/build_angular/src/tools/esbuild/commonjs-checker.ts
@@ -49,6 +49,11 @@ export function checkCommonJSModules(
   // using `provideHttpClient(withFetch())`.
   allowedRequests.add('xhr2');
 
+  // Packages used by @angular/ssr.
+  // While critters is ESM it has a number of direct and transtive CJS deps.
+  allowedRequests.add('express');
+  allowedRequests.add('critters');
+
   // Find all entry points that contain code (JS/TS)
   const files: string[] = [];
   for (const { entryPoint } of Object.values(metafile.outputs)) {
@@ -76,8 +81,14 @@ export function checkCommonJSModules(
       if (!imported.original || seenFiles.has(imported.path)) {
         continue;
       }
+
       seenFiles.add(imported.path);
 
+      // If the dependency is allowed ignore all other checks
+      if (allowedRequests.has(imported.original)) {
+        continue;
+      }
+
       // Only check actual code files
       if (!isPathCode(imported.path)) {
         continue;
@@ -141,11 +152,7 @@ function isPathCode(name: string): boolean {
  * @returns True, if specifier is potentially relative; false, otherwise.
  */
 function isPotentialRelative(specifier: string): boolean {
-  if (specifier[0] === '.') {
-    return true;
-  }
-
-  return false;
+  return specifier[0] === '.';
 }
 
 /**
diff --git a/packages/angular_devkit/build_angular/src/utils/server-rendering/render-worker.ts b/packages/angular_devkit/build_angular/src/utils/server-rendering/render-worker.ts
index 8b87d237400a..8007986454f9 100644
--- a/packages/angular_devkit/build_angular/src/utils/server-rendering/render-worker.ts
+++ b/packages/angular_devkit/build_angular/src/utils/server-rendering/render-worker.ts
@@ -28,7 +28,7 @@ export interface RenderOptions {
 const { outputFiles, document, inlineCriticalCss } = workerData as RenderWorkerData;
 
 /** Renders an application based on a provided options. */
-async function render(options: RenderOptions): Promise<RenderResult> {
+function render(options: RenderOptions): Promise<RenderResult> {
   return renderPage({
     ...options,
     outputFiles,