ccache has built in support for secandary shared remote cache on nfs:

https://ccache.dev/manual/4.5.1.html#_file_storage_backend

This backend stores data as separate files in a directory structure below DIRECTORY (an absolute path), similar (but not identical) to the primary cache storage. A typical use case for this backend would be sharing a cache on an NFS directory.

This could be useful for developers and is easily accessed via the mountable /efs directory on workstations.