diff --git a/.prettierrc b/.prettierrc
index e69de29b..0967ef42 100644
--- a/.prettierrc
+++ b/.prettierrc
@@ -0,0 +1 @@
+{}
diff --git a/src/builder/plugins/esbuild.ts b/src/builder/plugins/esbuild.ts
index 555c25d5..8cee8201 100644
--- a/src/builder/plugins/esbuild.ts
+++ b/src/builder/plugins/esbuild.ts
@@ -78,7 +78,7 @@ export function esbuild(options: Options): Plugin {
       }
 
       const result = await transform(code, {
-        ...options as any,
+        ...(options as any),
         loader,
         sourcefile: id,
         sourcemap: options.sourcemap ?? options.sourceMap,