diff --git a/packages/csx/package.json b/packages/csx/package.json
index 82e47b9..d15ea0b 100644
--- a/packages/csx/package.json
+++ b/packages/csx/package.json
@@ -33,8 +33,8 @@
     "watch": "npm-run-all -p watch-cjs watch-es6",
     "build-cjs": "rollup -c",
     "watch-cjs": "rollup -c -w",
-    "build-es6": "npx babel ./src --out-dir=lib --source-maps",
-    "watch-es6": "npx babel ./src --out-dir=lib --source-maps -w",
+    "build-es6": "npx babel ./src --out-dir=lib",
+    "watch-es6": "npx babel ./src --out-dir=lib -w",
     "npm-publish": "npm run build && npm publish --registry https://npm.cerxes.net"
   },
   "module": "./lib/index.js",