[Nix-dev] error: attribute ‘xmonadContrib’ missing

[Amy de Buitléir]

I'm getting an error message I don't understand. I haven't touched the
xmonadContrib stuff, so why would it be complaining about that?

[root at wombat9000:~]# nixos-rebuild switch 
building Nix...
building the system configuration...
error: attribute ‘xmonadContrib’ missing, at "/etc/nixos/configuration.nix":35:5
(use ‘--show-trace’ to show detailed location information)



# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  boot.loader.grub.device = "/dev/sda1";

  # Use the gummiboot efi boot loader.
  boot.loader.gummiboot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking.hostName = "wombat9000"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless.

  # Select internationalisation properties.
  i18n = {
    consoleFont = "lat9w-16";
    # consoleKeyMap = "ie";
    defaultLocale = "en_IE.UTF-8";
  };

  # List packages installed in system profile. To search by name, run:
  # -env -qaP | grep wget
  environment.systemPackages = with pkgs; [
    dmenu2
    dzen2
    haskellPackages.xmonad
    haskellPackages.xmonadContrib
    haskellPackages.xmonadExtras
    wget
    xsel
  ];

  nixpkgs.config.packageOverrides = pkgs : rec { 
    haskellngPackages = pkgs.haskell-ng.packages.ghc7101; 
  };

  nixpkgs.config.allowUnfree = true;

  security.sudo.enable = true;

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  # services.openssh.enable = true;

  # Enable CUPS to print documents.
  # services.printing.enable = true;

  # Enable the X11 windowing system.
  services.xserver.enable = true;
  services.xserver.layout = "ie";
  # services.xserver.xkbOptions = "eurosign:e";
  services.xserver.videoDrivers = [ "nvidia" ];

  # Enable the KDE Desktop Environment.
  # services.xserver.displayManager.kdm.enable = true;
  # services.xserver.displayManager.lightdm.enable = true;
  # services.xserver.displayManager.slim.enable = false;
  # services.xserver.desktopManager.kde4.enable = true;
  # services.xserver.desktopManager.xfce.enable = true;
  services.xserver.desktopManager.xterm.enable = false;
  services.xserver.desktopManager.default = "none";
  services.xserver.windowManager.xmonad.enable = true;
  services.xserver.windowManager.xmonad.extraPackages =
    haskellngPackages: [
    haskellngPackages.xmonad-contrib
                       ];

  users.extraUsers.amy = {
    description = "Amy de Buitléir";
    group = "users";
    extraGroups = [ "wheel" ];
    uid = 1000;
    createHome = true;
    home = "/home/amy";
    shell = "/run/current-system/sw/bin/bash";
  };

}