{
  pkgs,
  lib,
  ...
}: {
  programs.fish = {
    shellAbbrs = lib.mergeAttrsList [
      (lib.optionalAttrs pkgs.stdenv.isLinux {
        "," = "nix-shell --command fish -p";
      })
    ];

    shellAliases = lib.mergeAttrsList [
      {
        rm = "rm -I"; # idiot protection
        tree = "tree -Cph";
      }

      (lib.optionalAttrs pkgs.stdenv.isLinux {
        # idiot protection
        chmod = "chmod --preserve-root";
        chown = "chown --preserve-root";
      })
    ];
  };
}