diff --git a/src/website-deploy/website-deploy-agent.service.ts b/src/website-deploy/website-deploy-agent.service.ts
index e4d51fb..43a35f5 100644
--- a/src/website-deploy/website-deploy-agent.service.ts
+++ b/src/website-deploy/website-deploy-agent.service.ts
@@ -1,42 +1,62 @@
 import { Injectable, ServiceUnavailableException } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
+import * as http from 'node:http';
+import * as https from 'node:https';
 import { provisionUrlFromDeployUrl, sslUrlFromDeployUrl, parkUrlFromDeployUrl, unparkUrlFromDeployUrl } from './website-deploy.util';
 
 /** Cold `npm ci` + `next build` often exceeds 5–10 minutes. */
 const DEPLOY_WAIT_MS = 30 * 60 * 1000;
 
 /**
- * Node `fetch` (undici) defaults `headersTimeout` to 5 minutes. AbortSignal
- * does not override that — without this agent, Nest aborts while the websites
- * VM is still compiling and Super Admin shows a false "Deploy failed".
- * `node:undici` is built into Node 20; this project's @types/node has no types.
+ * Long POST without `fetch`. This API VM's Node 20 build has no `node:undici`,
+ * and undici's default headersTimeout is 5 minutes even when it is present.
  */
-const deployWaitAgent = new (
-  require('node:undici') as {
-    Agent: new (opts: {
-      headersTimeout?: number;
-      bodyTimeout?: number;
-      connectTimeout?: number;
-    }) => object;
-  }
-).Agent({
-  headersTimeout: DEPLOY_WAIT_MS,
-  bodyTimeout: DEPLOY_WAIT_MS,
-  connectTimeout: 30_000,
-});
-
-function isFetchWaitTimeout(err: unknown): boolean {
-  if (!(err instanceof Error)) return false;
-  if (err.name === 'TimeoutError' || err.name === 'HeadersTimeoutError' || err.name === 'BodyTimeoutError') {
-    return true;
-  }
-  const cause = (err as { cause?: { code?: string; name?: string } }).cause;
-  return (
-    cause?.code === 'UND_ERR_HEADERS_TIMEOUT' ||
-    cause?.code === 'UND_ERR_BODY_TIMEOUT' ||
-    cause?.name === 'HeadersTimeoutError' ||
-    cause?.name === 'BodyTimeoutError'
-  );
+function postJson(
+  url: string,
+  headers: Record<string, string>,
+  bodyObj: unknown,
+  timeoutMs: number,
+): Promise<{ ok: boolean; status: number; text: string }> {
+  return new Promise((resolve, reject) => {
+    const body = JSON.stringify(bodyObj);
+    const parsed = new URL(url);
+    const lib = parsed.protocol === 'https:' ? https : http;
+    const req = lib.request(
+      {
+        protocol: parsed.protocol,
+        hostname: parsed.hostname,
+        port: parsed.port || (parsed.protocol === 'https:' ? 443 : 80),
+        path: `${parsed.pathname}${parsed.search}`,
+        method: 'POST',
+        headers: {
+          ...headers,
+          'Content-Type': 'application/json',
+          'Content-Length': String(Buffer.byteLength(body)),
+        },
+      },
+      (res) => {
+        const chunks: Buffer[] = [];
+        res.on('data', (chunk: Buffer) => chunks.push(chunk));
+        res.on('end', () => {
+          const status = res.statusCode ?? 0;
+          resolve({
+            ok: status >= 200 && status < 300,
+            status,
+            text: Buffer.concat(chunks).toString('utf8'),
+          });
+        });
+      },
+    );
+    req.setTimeout(timeoutMs, () => {
+      req.destroy();
+      const err = new Error('TimeoutError');
+      err.name = 'TimeoutError';
+      reject(err);
+    });
+    req.on('error', reject);
+    req.write(body);
+    req.end();
+  });
 }
 
 @Injectable()
@@ -88,20 +108,16 @@ export class WebsiteDeployAgentService {
     const { deployUrl, token } = this.credentials();
     const wait = options?.wait !== false;
 
-    let response: Response;
+    let result: { ok: boolean; status: number; text: string };
     try {
-      response = await fetch(deployUrl, {
-        method: 'POST',
-        headers: {
-          'Content-Type': 'application/json',
-          'X-Deploy-Token': token,
-        },
-        body: JSON.stringify({ slug, wait }),
-        signal: AbortSignal.timeout(DEPLOY_WAIT_MS),
-        dispatcher: deployWaitAgent,
-      } as RequestInit);
+      result = await postJson(
+        deployUrl,
+        { 'X-Deploy-Token': token },
+        { slug, wait },
+        DEPLOY_WAIT_MS,
+      );
     } catch (err) {
-      if (isFetchWaitTimeout(err)) {
+      if (err instanceof Error && err.name === 'TimeoutError') {
         throw new ServiceUnavailableException(
           'Deploy timed out waiting for websites server (30m)',
         );
@@ -109,7 +125,6 @@ export class WebsiteDeployAgentService {
       throw new ServiceUnavailableException('Could not reach website deploy agent');
     }
 
-    const text = await response.text().catch(() => '');
     let payload: {
       status?: string;
       slug?: string;
@@ -117,15 +132,15 @@ export class WebsiteDeployAgentService {
       error?: string;
     } = {};
     try {
-      payload = text ? (JSON.parse(text) as typeof payload) : {};
+      payload = result.text ? (JSON.parse(result.text) as typeof payload) : {};
     } catch {
       /* keep raw */
     }
 
-    if (!response.ok) {
-      const detail = payload.detail || payload.error || text;
+    if (!result.ok) {
+      const detail = payload.detail || payload.error || result.text;
       throw new ServiceUnavailableException(
-        `Deploy failed (${response.status})${detail ? `: ${detail}` : ''}`,
+        `Deploy failed (${result.status})${detail ? `: ${detail}` : ''}`,
       );
     }