This plugin does not work with module name with slash "/". It looks like generated files are in wrong directory.
For example my module names are:
- frontent/module_a
- admin/module_b
In this case files generated by webpack go to the following directories:
- build_dir/frontend/module_a
- build_dir/admin/module_b
But this plugin puts generated files to:
- build_dir/module_a
- build_dir/module_b