diff --git a/build.ts b/build.ts
index d3bfca9..736d2f1 100644
--- a/build.ts
+++ b/build.ts
@@ -7,6 +7,7 @@ const result = await Bun.build({
   entrypoints: ['src/index.ts'],
   outdir: 'dist',
   target: 'bun',
+  external: ['unimport'],
   // minify: true,
   plugins: [dts()],
 })