Unable to resolve nested `$ref`s when using local files

[GitGraf]

I'm trying to build a repository hosting JSON schemas of our application data, alongside with examples of those schemas.
To make sure the examples stay in sync with the schemas, I want to validate them.

If my schema references another schema, validation seems to work as expected.
However, if that other schema in turn references a third schema, that third schema cannot be resolved.

Please see https://github.com/GitGraf/check-jsonschema-resolve for a minimal reproducer.