diff --git a/packages/@apphosting/adapter-angular/src/bin/build.ts b/packages/@apphosting/adapter-angular/src/bin/build.ts
index cc67f4a8..5ea5c803 100644
--- a/packages/@apphosting/adapter-angular/src/bin/build.ts
+++ b/packages/@apphosting/adapter-angular/src/bin/build.ts
@@ -4,6 +4,7 @@ import {
   checkBuildConditions,
   validateOutputDirectory,
   parseOutputBundleOptions,
+  outputBundleExists,
 } from "../utils.js";
 import { getBuildOptions, runBuild } from "@apphosting/common";
 
@@ -21,8 +22,10 @@ const { stdout: output } = await runBuild();
 if (!output) {
   throw new Error("No output from Angular build command, expecting a build manifest file.");
 }
-const outputBundleOptions = parseOutputBundleOptions(output);
-const root = process.cwd();
-await generateBuildOutput(root, outputBundleOptions, process.env.FRAMEWORK_VERSION);
+if (!outputBundleExists()) {
+  const outputBundleOptions = parseOutputBundleOptions(output);
+  const root = process.cwd();
+  await generateBuildOutput(root, outputBundleOptions, process.env.FRAMEWORK_VERSION);
 
-await validateOutputDirectory(outputBundleOptions);
+  await validateOutputDirectory(outputBundleOptions);
+}
diff --git a/packages/@apphosting/adapter-angular/src/utils.ts b/packages/@apphosting/adapter-angular/src/utils.ts
index 357b750b..c953c4e7 100644
--- a/packages/@apphosting/adapter-angular/src/utils.ts
+++ b/packages/@apphosting/adapter-angular/src/utils.ts
@@ -24,7 +24,10 @@ const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 const SIMPLE_SERVER_FILE_PATH = join(__dirname, "simple-server", "bundled_server.mjs");
 
-export const REQUIRED_BUILDER = "@angular-devkit/build-angular:application";
+export const ALLOWED_BUILDERS = [
+  "@angular-devkit/build-angular:application",
+  "@analogjs/platform:vite",
+];
 
 /**
  * Check if the following build conditions are satisfied for the workspace:
@@ -38,9 +41,9 @@ export async function checkBuildConditions(opts: BuildOptions): Promise<void> {
     const output = execSync(`npx nx show project ${opts.projectName}`);
     const projectJson = JSON.parse(output.toString());
     const builder = projectJson.targets.build.executor;
-    if (builder !== REQUIRED_BUILDER) {
+    if (!ALLOWED_BUILDERS.includes(builder)) {
       throw new Error(
-        "Only the Angular application builder is supported. Please refer to https://angular.dev/tools/cli/build-system-migration#for-existing-applications guide to upgrade your builder to the Angular application builder. ",
+        `Currently, only the following builders are supported: ${ALLOWED_BUILDERS.join(",")}.`,
       );
     }
     return;
@@ -75,9 +78,9 @@ export async function checkBuildConditions(opts: BuildOptions): Promise<void> {
   if (!workspaceProject.targets.has(target)) throw new Error("Could not find build target.");
 
   const { builder } = workspaceProject.targets.get(target)!;
-  if (builder !== REQUIRED_BUILDER) {
+  if (!ALLOWED_BUILDERS.includes(builder)) {
     throw new Error(
-      "Only the Angular application builder is supported. Please refer to https://angular.dev/tools/cli/build-system-migration#for-existing-applications guide to upgrade your builder to the Angular application builder. ",
+      `Currently, only the following builders are supported: ${ALLOWED_BUILDERS.join(",")}.`,
     );
   }
 }
@@ -226,3 +229,11 @@ export const isMain = (meta: ImportMeta) => {
   if (!process.argv[1]) return false;
   return process.argv[1] === fileURLToPath(meta.url);
 };
+
+export const outputBundleExists = () => {
+  const outputBundleDir = resolve(".apphosting");
+  if (existsSync(outputBundleDir)) {
+    return true;
+  }
+  return false;
+};