diff --git a/cli/scripts/build-cli.js b/cli/scripts/build-cli.js
index 48dd0910..625d94ba 100644
--- a/cli/scripts/build-cli.js
+++ b/cli/scripts/build-cli.js
@@ -135,7 +135,15 @@ console.log("✅ Cleaned\n");
 console.log("3️⃣  Copying Next.js standalone build to app/cli/app...");
 const standaloneRoot = path.join(appDir, ".next", "standalone");
 const standaloneRootResolved = path.join(buildDistDir, "standalone");
-const standaloneRootToUse = fs.existsSync(standaloneRootResolved) ? standaloneRootResolved : standaloneRoot;
+let standaloneRootToUse = fs.existsSync(standaloneRootResolved) ? standaloneRootResolved : standaloneRoot;
+// Next.js 16 nests standalone output under the project name when NEXT_TRACING_ROOT_MODE=workspace
+// e.g. .next-cli-build/standalone/9router/server.js
+const pkgName = path.basename(appDir);
+const nestedRoot = path.join(standaloneRootToUse, pkgName);
+if (fs.existsSync(path.join(nestedRoot, "server.js")) && !fs.existsSync(path.join(standaloneRootToUse, "server.js"))) {
+  console.log(`ℹ️  Detected nested standalone output: ${pkgName}/`);
+  standaloneRootToUse = nestedRoot;
+}
 const standaloneApp = fs.existsSync(path.join(standaloneRootToUse, "server.js"))
   ? standaloneRootToUse
   : path.join(standaloneRootToUse, "app");