diff --git a/packages/xo-server-auth-ldap/.babelrc b/packages/xo-server-auth-ldap/.babelrc
new file mode 100644
index 000000000..0bb8741f7
--- /dev/null
+++ b/packages/xo-server-auth-ldap/.babelrc
@@ -0,0 +1,14 @@
+{
+  "comments": false,
+  "compact": true,
+  "optional": [
+    // Experimental features.
+    // "minification.constantFolding",
+    // "minification.deadCodeElimination",
+
+    "es7.asyncFunctions",
+    "es7.decorators",
+    "es7.functionBind",
+    "runtime"
+  ]
+}
diff --git a/packages/xo-server-auth-ldap/package.json b/packages/xo-server-auth-ldap/package.json
index b211562fa..122d49271 100644
--- a/packages/xo-server-auth-ldap/package.json
+++ b/packages/xo-server-auth-ldap/package.json
@@ -40,8 +40,8 @@
     "trace": "^1.2.0"
   },
   "scripts": {
-    "build": "mkdir -p dist && babel --optional=runtime --compact=true --source-maps --out-dir=dist/ src/",
-    "dev": "mkdir -p dist && babel --watch --optional=runtime --compact=true --source-maps --out-dir=dist/ src/",
+    "build": "babel --source-maps --out-dir=dist/ src/",
+    "dev": "babel --watch --source-maps --out-dir=dist/ src/",
     "prepublish": "npm run build",
     "test": "mocha --opts .mocha.opts \"dist/**/*.spec.js\"",
     "test-dev": "mocha --opts .mocha.opts --watch --reporter=min \"dist/**/*.spec.js\""