diff --git a/code/lib/core-server/src/build-dev.ts b/code/lib/core-server/src/build-dev.ts
index 96bbc120fc7f..0b59384745bc 100644
--- a/code/lib/core-server/src/build-dev.ts
+++ b/code/lib/core-server/src/build-dev.ts
@@ -74,10 +74,15 @@ export async function buildDevStandalone(
   const { framework } = config;
   const corePresets = [];
 
-  const frameworkName = typeof framework === 'string' ? framework : framework?.name;
-  validateFrameworkName(frameworkName);
+  let frameworkName = typeof framework === 'string' ? framework : framework?.name;
+  if (!options.ignorePreview) {
+    validateFrameworkName(frameworkName);
+  }
+  if (frameworkName) {
+    corePresets.push(join(frameworkName, 'preset'));
+  }
 
-  corePresets.push(join(frameworkName, 'preset'));
+  frameworkName = frameworkName || 'custom';
 
   try {
     await warnOnIncompatibleAddons(config);
diff --git a/code/lib/core-server/src/build-static.ts b/code/lib/core-server/src/build-static.ts
index cde136c47413..b09300c56cc6 100644
--- a/code/lib/core-server/src/build-static.ts
+++ b/code/lib/core-server/src/build-static.ts
@@ -73,7 +73,7 @@ export async function buildStaticStandalone(options: BuildStaticStandaloneOption
   const frameworkName = typeof framework === 'string' ? framework : framework?.name;
   if (frameworkName) {
     corePresets.push(join(frameworkName, 'preset'));
-  } else {
+  } else if (!options.ignorePreview) {
     logger.warn(`you have not specified a framework in your ${options.configDir}/main.js`);
   }