diff --git a/packages/opencode/script/build.ts b/packages/opencode/script/build.ts
index f760899c39..c330bc0e3d 100755
--- a/packages/opencode/script/build.ts
+++ b/packages/opencode/script/build.ts
@@ -197,6 +197,9 @@ for (const item of targets) {
     tsconfig: "./tsconfig.json",
     plugins: [plugin],
     external: ["node-gyp"],
+    format: "esm",
+    minify: true,
+    splitting: true,
     compile: {
       autoloadBunfig: false,
       autoloadDotenv: false,