update

I've been trying to get it to work with Next.js v11 and now v12 but have never had any success. Would you mind providing an example?

Thanks

Should add a sentence in FetcherInterface docstring that explains that the public API of the interface is implemented already: implementations of the interface only need to implement the internal

def _fetch(self, url: str) -> Iterator[bytes]

If CPM_SOURCE_CACHE is set to an empty string, CPM fails with file DOWNLOAD error: cannot create directory '/cpm' - Specify file by full.