IF YOU ARE USING ilib-webpack-plugin WITH OLD ENYO BUILDS, THIS VERSION IS NOT THE ONE YOU ARE LOOKING FOR. You need the older version < 1.0.0. Make sure to specify that in your package.json.
ilib-webpack-plugin is a webpack plugin for ilib so that you can use ilib in your own webpack project and only include the ilib classes and locale data that you actually need. It can also be used to create a custom version of ilib, even if you are not using webpack in your own project.
To use iLib in your own project, you will need both the ilib-webpack-plugin and the ilib-webpack-loader together, both with versions > 1.0.0.
The full documentation for the use of this plugin and the loader together is in the ilib-webpack-loader project.