When installing through nix, the fish shell completion for babashka doesn't work. Looking at the nix file https://github.com/NixOS/nixpkgs/blob/d2c0f33faf2d614b56e96faeea29fc93a9bb518c/pkgs/development/interpreters/babashka/wrapped.nix#L42C1-L42C1, it seems that the zsh completions are exported to bb.fish, which causes them to be loaded in fish. Where do I add an issue for this - in the nixpkgs repository, or in the babashka repository?