diff --git a/package.json b/package.json
index 9bf5e8d..30b9943 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "watch": "mocha --watch",
     "build.web": "browserify ./lib/vcd-web.js | terser --compress -o demo/vcd-web.min.js",
     "watch.web": "watchify ./lib/vcd-web.js -o demo/vcd-web.min.js -v",
+    "preinstall": "node bin/build.js",
     "prepare": "node bin/build.js"
   },
   "files": [