Angular 9 how to include fonts during library build - assets

Question

I´m trying to use my angular library for an external project.
I would like this project can use directly fonts from my library.
I noticed the folder projects/my-library/src/lib/styles/fonts is not included when I build my library.
I tried to follow answers of this similar question without success.
I tried this :
ng-package.json
{
"$schema": "../../node_modules/ng-packagr/ng-package.schema.json",
"dest": "../../dist/my-library",
"assets": [
"./src/lib/styles/fonts/**"
],
"lib": {
"entryFile": "src/public-api.ts",
"styleIncludePaths": ["node_modules", "src/lib/styles"]
}
}
In this case, I have a directory src/... created in dist/my-library and I got this error:
An unhandled exception occurred: EEXIST: file already exists, mkdir 'path/to/dist/my-library/src/lib/styles/fonts'
or
{
"$schema": "../../node_modules/ng-packagr/ng-package.schema.json",
"dest": "../../dist/my-library",
"lib": {
"entryFile": "src/public-api.ts",
"styleIncludePaths": ["node_modules", "src/lib/styles"],
"cssUrl": "inline"
}
}
I got this error :
WARNING: postcss-url: ... Can't read file 'path/to/font.eot'
Someone knows the way to properly include fonts or others assets for library build like inside dist/my-library/lib/styles/fonts ?