This is really cool but in my case, for example, I already have many packages and overrides that I basically lost track of what I did.

For a new user it would be really useful if there was a script to generate a Nix module based on what I already have so then I can start my setup or just retrofeed impure state back to the pure setup.

I may do that, but I opened this at least to gather feedback on how would be the best approach for that.