diff --git a/package.json b/package.json
index cf4963a5..3f9625f2 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
     "lint": "eslint .",
     "build": "webpack --config=config/webpack.prod.js",
     "build-library": "webpack --config=config/webpack.library.js",
+    "prepublishOnly": "npm run build-library",
     "serve": "http-server ./built",
     "start": "webpack-dev-server --config=config/webpack.dev.js",
     "weight": "echo 'FIXME: Need to find cache-busted file' || (npm run build && gzip-size built/winamp.js)",