{ inputs, lib, ... }: { perSystem = {pkgs, ...}: let fishConf = pkgs.writeText "fishConf" '' function fish_greeting ${lib.getExe pkgs.fastfetch} end fish_vi_key_bindings ''; in { packages.fish = inputs.wrappers.lib.wrapPackage { inherit pkgs; package = pkgs.fish; flags = { "-C" = "source ${fishConf}"; }; }; }; }