From cd72b9427bac1f864f7bb4cde615837519a8948c Mon Sep 17 00:00:00 2001
From: ElijahJunaid <121450694+ElijahJunaid@users.noreply.github.com>
Date: Wed, 29 Oct 2025 12:26:08 -0400
Subject: [PATCH] Update run-build.ts

---
 src/utils/run-build.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/utils/run-build.ts b/src/utils/run-build.ts
index 13a5432f444..66c7e1fbf60 100644
--- a/src/utils/run-build.ts
+++ b/src/utils/run-build.ts
@@ -126,7 +126,8 @@ export async function runNetlifyBuild({
     })
 
     settings.frameworkHost = ipVersion === 6 ? '::1' : '127.0.0.1'
-    settings.detectFrameworkHost = options.skipWaitPort
+    // Enable IPv4/IPv6 auto-detection when port checking is enabled
+    settings.detectFrameworkHost = !options.skipWaitPort
   }
 
   if (timeline === 'build') {