diff --git a/packages/schematics/angular/ssr/index.ts b/packages/schematics/angular/ssr/index.ts
index 9aa44f6686d5..6249778a8594 100644
--- a/packages/schematics/angular/ssr/index.ts
+++ b/packages/schematics/angular/ssr/index.ts
@@ -451,6 +451,12 @@ async function isServerRoutingEnabled(
     return serverRoutingDefault;
   }
 
+  // `inquirer` requires `async_hooks` which isn't supported by webcontainers, therefore we can't prompt in that context.
+  // See: https://github.com/SBoudrias/Inquirer.js/issues/1426
+  if (process.versions.webcontainer) {
+    return serverRoutingDefault;
+  }
+
   // Prompt the user if in an interactive terminal and no option was provided.
   return await prompt(
     'Would you like to use the Server Routing and App Engine APIs (Developer Preview) for this server application?',
diff --git a/packages/schematics/angular/ssr/index_spec.ts b/packages/schematics/angular/ssr/index_spec.ts
index 7f917f8d4df6..a7de8d12f208 100644
--- a/packages/schematics/angular/ssr/index_spec.ts
+++ b/packages/schematics/angular/ssr/index_spec.ts
@@ -108,6 +108,7 @@ describe('SSR Schematic', () => {
 
     afterEach(() => {
       process.env['NG_FORCE_TTY'] = originalTty;
+      delete process.versions.webcontainer;
     });
 
     it('should add script section in package.json', async () => {
@@ -230,6 +231,22 @@ describe('SSR Schematic', () => {
 
       expect(tree.exists('/projects/test-app/src/app/app.routes.server.ts')).toBeFalse();
     });
+
+    it('does not prompt when running in a web container', async () => {
+      const prompter = jasmine.createSpy<Prompt>('prompt').and.resolveTo(false);
+      setPrompterForTestOnly(prompter);
+
+      process.versions.webcontainer = 'abc123'; // Simulate webcontainer.
+      const tree = await schematicRunner.runSchematic(
+        'ssr',
+        { ...defaultOptions, serverRouting: undefined },
+        appTree,
+      );
+
+      expect(prompter).not.toHaveBeenCalled();
+
+      expect(tree.exists('/projects/test-app/src/app/app.routes.server.ts')).toBeFalse();
+    });
   });
 
   describe('Legacy browser builder', () => {