diff --git a/internal/build/src/utils/rollup.ts b/internal/build/src/utils/rollup.ts
index 318e55b5bd..dc9566a9e7 100644
--- a/internal/build/src/utils/rollup.ts
+++ b/internal/build/src/utils/rollup.ts
@@ -6,7 +6,7 @@ export const generateExternal = async (options: { full: boolean }) => {
   const { dependencies, peerDependencies } = getPackageDependencies(epPackage)
 
   return (id: string) => {
-    const packages: string[] = peerDependencies
+    const packages: string[] = [...peerDependencies]
     if (!options.full) {
       packages.push('@vue', ...dependencies)
     }