anchor.diff:        enable = mkOption {
           default = false;
           description = ''
  -          Whenever to configure Zsh as an interactive shell.
  +          Whether to configure zsh as an interactive shell.
           '';
           type = types.bool;
         };
  
positive.code: 
      environment.etc."zinputrc".source = ./zinputrc;
  
      environment.systemPackages = [ pkgs.zsh ];
  
      #users.defaultUserShell = mkDefault "/run/current-system/sw/bin/zsh";
  
  
negative.code:         type = types.lines;
        };
  
        enableCompletion = mkOption {
          default = true;
          description = ''
            Enable zsh completion for all interactive zsh shells.
          '';
          type = types.bool;
        };
  
      };
  
    };
  