For me it took some time. Finishing Nix Pills was enough knowledge to start looking into nix and nixpkgs manual and understanding it. I still get frustrated th

For me it took some time. Finishing Nix Pills was enough knowledge to start looking into nix and nixpkgs manual and understanding it. I still get frustrated that some new features that are being added are undocumented, though I also noticed that the nixpkgs documentation by default is set to last stable version. This means changes could be delayed by even 6 months. And given how rapidly nixpkgs change that could be the reason.