[solved] Merged CSS in Meteor v3

Hello,
Since meteor v3, it seems that css files located in the folder /client (at the root of the meteor folder) are not merged anymore automatically. Is this correct ?

It was the case in Meteor version 2.15

Should we import css files differently now ?

I was able to import the css with Meteor v3 from my core package this way :

 api.addFiles([
    'client/css/style.css',
    'client/css/style2.css',
  ], ['client']);

Simply putting them in the client folder at the root of the meteor project does not work anymore