title: Impossible to find Angular main module of my private library from an application since a specific version
body: <ol>
  <li>I had no problem to use my library (0.17.23) inside an application
  until the new version (0.17.24).</li>
  <li>I had no error when I build my library in 0.17.24 : <code>ng build my-lib --prod</code>
  and i published it.</li>
  <li>I had no error when I update it inside the external application :
  <code>npm install --legacy-peer-deps</code></li>
  </ol>
  <p>...But when I run <code>ng serve</code> on local server I got this new error :</p>
  <blockquote>
  <p>Error: ./node_modules/@my-organization/my-lib/fesm2015/my-organization-my-lib.js
  Module not found: Error: Can't resolve 'my-main-module' in 'D:\path-to-project\node_modules@my-organization\my-lib\fesm2015'</p>
  </blockquote>
  <p>I have no log more so I'm little lost to understand what happens, someone has got an explanation and solution for that ?</p>