diff --git a/cli/conf.ts b/cli/conf.ts
index f569008166..f18247ac15 100644
--- a/cli/conf.ts
+++ b/cli/conf.ts
@@ -33,6 +33,7 @@ export interface Codebase {
     to: string;
   }[];
   customBundler?: string;
+  external?: string[];
 }
 
 export async function readConfigFile(): Promise<SyncOptions> {
diff --git a/cli/script.ts b/cli/script.ts
index 34c27eb3b3..03f6bfb1de 100644
--- a/cli/script.ts
+++ b/cli/script.ts
@@ -172,6 +172,7 @@ export async function handleFile(
           format: "cjs",
           bundle: true,
           write: false,
+          external: codebase.external,
           platform: "node",
           packages: "bundle",
           target: "node20.15.1",