When structuring, how to forbid type casting to base classes?

I want to use cattrs to structure dicts and other stuff to attrs. However, I am unhappy with the default behaviour that if attrs expects an int, float, str, bool or something like that, it casts the object to that type using int(), float(), str(), or bool() respectively. I want cattrs to structure containers such as sequences, dicts, etc. but I don't want it to typecast base types - I want it to error out instead if the types don't match. How can I do this?

Start by tracing cattrs structuring for primitive attrs fields and the configuration or entry points that control it; no specific files or tests are named in the issue. Done means primitive values are rejected when their types do not match, while container structuring continues to work.