nix/doc/manual/rl-next/duplicate-copy.md

synopsis	issues	prs
No longer copy flakes that are in the nix store	10435	12877 13098

Previously, we would duplicate entries like path:/nix/store/* back into the Nix store. This was prominently visible for pinned system flake registry entries in NixOS, e.g., when running nix run nixpkgs#hello.