diff --git a/internal/lint-configs/oxfmt-config/build.config.ts b/internal/lint-configs/oxfmt-config/build.config.ts
deleted file mode 100644
index 97e572c56..000000000
--- a/internal/lint-configs/oxfmt-config/build.config.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import { defineBuildConfig } from 'unbuild';
-
-export default defineBuildConfig({
-  clean: true,
-  declaration: true,
-  entries: ['src/index'],
-});
diff --git a/internal/lint-configs/oxfmt-config/package.json b/internal/lint-configs/oxfmt-config/package.json
index 3e016797e..2355a9de5 100644
--- a/internal/lint-configs/oxfmt-config/package.json
+++ b/internal/lint-configs/oxfmt-config/package.json
@@ -12,7 +12,8 @@
   "license": "MIT",
   "type": "module",
   "scripts": {
-    "stub": "pnpm unbuild --stub"
+    "build": "pnpm exec tsdown",
+    "stub": "pnpm exec tsdown"
   },
   "files": [
     "dist"
diff --git a/internal/lint-configs/oxfmt-config/src/index.ts b/internal/lint-configs/oxfmt-config/src/index.ts
index 5f88c1809..edce2504a 100644
--- a/internal/lint-configs/oxfmt-config/src/index.ts
+++ b/internal/lint-configs/oxfmt-config/src/index.ts
@@ -2,7 +2,7 @@ import { defineConfig as defineOxfmtConfig } from 'oxfmt';
 
 type OxfmtConfig = Parameters<typeof defineOxfmtConfig>[0];
 
-const oxfmtConfig = defineOxfmtConfig({
+const oxfmtConfig: OxfmtConfig = defineOxfmtConfig({
   printWidth: 80,
   proseWrap: 'never',
   semi: true,
@@ -28,7 +28,7 @@ const oxfmtConfig = defineOxfmtConfig({
   ],
 });
 
-function defineConfig(config: OxfmtConfig = {}) {
+function defineConfig(config: OxfmtConfig = {}): OxfmtConfig {
   return defineOxfmtConfig({
     ...oxfmtConfig,
     ...config,
diff --git a/internal/lint-configs/oxfmt-config/tsdown.config.ts b/internal/lint-configs/oxfmt-config/tsdown.config.ts
new file mode 100644
index 000000000..c4f51c5ee
--- /dev/null
+++ b/internal/lint-configs/oxfmt-config/tsdown.config.ts
@@ -0,0 +1,11 @@
+import { defineConfig } from 'tsdown';
+
+export default defineConfig({
+  clean: true,
+  dts: true,
+  entry: ['src/index.ts'],
+  format: ['esm'],
+  outExtensions: () => ({
+    dts: '.d.ts',
+  }),
+});