Just ran into this... I have a common library shared among multiple transpiled products. I was using symlinks with brunch to handle sharing things between the projects. When moving to webpack, this stopped working.
What did get things working was using webpack configuration to turn off symlink resolving.
i.e. adding this in webpack.config.js
:
module.exports = {
//...
resolve: {
symlinks: false
}
};
as documented here:
https://webpack.js.org/configuration/resolve/#resolvesymlinks