{ pkgs, ... }:
{
  home.packages = [
    pkgs.nix-your-shell
    pkgs.lolcat
    pkgs.kittysay
  ];

  programs.fish = {
    enable = true;
    shellInit = ''
      function fish_prompt
        if test -z $IN_NIX_SHELL
          printf '%s%s λ %s' (set_color magenta) $(prompt_pwd) (set_color normal)
        else
          printf '%s%s%s [nix-shell %s]%s λ%s ' (set_color magenta) $(prompt_pwd) (set_color yellow) $IN_NIX_SHELL (set_color magenta) (set_color normal)
        end
      end

      function fish_greeting
      end

      function nix-shell --description "Start an interactive shell based on a Nix expression"
        nix-your-shell  fish nix-shell -- $argv
      end

      function nix --description "Reproducible and declarative configuration management"
        nix-your-shell  fish nix -- $argv
      end
    '';

    shellInitLast = ''
      set fish_color_normal green 
      set fish_color_command magenta --bold
      set fish_color_quote yellow
      set fish_color_redirection white
      set fish_color_end magenta 
      set fish_color_error red --bold
      set fish_color_param blue
      set fish_color_valid_path blue 
      set fish_color_option blue
      set fish_color_comment brblack --italics
      set fish_color_operator yellow
      set fish_color_escape blue --italics
      set fish_color_autosuggestion brblack
      set fish_color_cancel brblack
    '';
  };
}