xorg and nixos configuration files

configuration.nix

# 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
    ];

  # Use the gummiboot efi boot loader.
  boot.loader.gummiboot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  boot.loader.gummiboot.timeout = 5;

  time.timeZone = "Europe/Berlin";

  fonts.enableCoreFonts = true;
  fonts.fonts = with pkgs; [
    corefonts
    liberation_ttf
    dejavu_fonts
    terminus_font
    ubuntu_font_family
    gentium
  ];

  nixpkgs.config.allowUnfree = true;
  nix.binaryCaches = [ http://cache.nixos.org http://hydra.nixos.org ];

  # networking.hostName = "nixos"; # Define your hostname.
  networking.hostId = "3593dc09";
  networking.hostName = "nixoslappy";
  networking.wireless.enable = true;  # Enables wireless.

  hardware.bluetooth.enable = true;
  services.upower.enable = true;
  services.nixosManual.showManual = true;

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

  # List packages installed in system profile. To search by name, run:
  # $ nix-env -qaP | grep wget
  environment.systemPackages = with pkgs; [
     wget
     vim
     python
     ruby
     chromium
     acpi
     gitFull
     tmux
     awesome
  ];

  # 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.xkbOptions = "eurosign:e";
  services.xserver = {
    enable = true;
    layout = "us";
    xkbVariant = "mac";
    xkbOptions = "terminate:ctrl_alt_bksp, ctrl:nocaps";
    videoDrivers = [ "intel" ];

    desktopManager.default = "none";
    desktopManager.xterm.enable = false;
    displayManager = {
      lightdm.enable = true;
      desktopManagerHandlesLidAndPower = false;
    };
    windowManager.default = "awesome";
    windowManager.awesome.enable = true;

    synaptics.additionalOptions = ''
      Option "VertScrollDelta "-100"
      Option "HorizScrollDelta "-100"
    '';
    synaptics.buttonsMap = [ 1 3 2 ];
    synaptics.enable = true;
    synaptics.tapButtons = false;
    synaptics.fingersMap = [ 0 0 0 ];
    synaptics.twoFingerScroll = true;
    synaptics.vertEdgeScroll = false;

    
  };

  # Enable the KDE Desktop Environment.
  # services.xserver.displayManager.kdm.enable = true;
  # services.xserver.desktopManager.kde4.enable = true;

  security.sudo.enable = true;
  # security.sudo.wheelNeedsPassword = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
   users.mutableUsers = true;
   users.extraUsers.gilligan = {
     group = "users";
     extraGroups = [ "wheel" ];
     createHome = true;
     isNormalUser = true;
     uid = 1000;
     shell = "/run/current-system/sw/bin/zsh";
   };

  programs.zsh.enable = true;

}

gistfile1.txt

# Do not modify this file!  It was generated by ‘nixos-generate-config’
# and may be overwritten by future invocations.  Please make changes
# to /etc/nixos/configuration.nix instead.
{ config, lib, pkgs, ... }:

{
  imports =
    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
    ];

  boot.initrd.availableKernelModules = [ "xhci_hcd" "ahci" "usbhid" "usb_storage" ];
  boot.kernelModules = [ "kvm-intel" "wl" ];
  boot.extraModulePackages = [ config.boot.kernelPackages.broadcom_sta ];

  fileSystems."/" =
    { device = "/dev/disk/by-uuid/e62e432e-eea2-4771-9bc5-8bb3d6cf13f5";
      fsType = "ext4";
    };

  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/67E3-17ED";
      fsType = "vfat";
    };

  swapDevices =
    [ { device = "/dev/disk/by-uuid/4a2df01d-e104-4b7f-8464-d8a20c3d82da"; }
    ];

  nix.maxJobs = 8;
}

Xorg.0.log

[   165.023] 
X.Org X Server 1.16.4
Release Date: 2014-12-20
[   165.023] X Protocol Version 11, Revision 0
[   165.023] Build Operating System: Linux 3.12.27 x86_64 
[   165.023] Current Operating System: Linux nixoslappy 3.14.34 #1-NixOS SMP Thu Jan 1 00:00:01 UTC 1970 x86_64
[   165.023] Kernel command line: initrd=\efi\nixos\pnhjgx3v9pkxyhqhjcxh62l2axwnwd3g-initrd-initrd.efi systemConfig=/nix/store/siybfc2y9prrwk6bab8bz8yh0460axwb-nixos-14.12.496.5f7d374 init=/nix/store/siybfc2y9prrwk6bab8bz8yh0460axwb-nixos-14.12.496.5f7d374/init loglevel=4
[   165.023] Build Date: 01 March 2015  04:27:12AM
[   165.023]  
[   165.023] Current version of pixman: 0.32.6
[   165.023] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[   165.023] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[   165.023] (==) Log file: "/home/gilligan/.local/share/xorg/Xorg.0.log", Time: Mon May 25 02:07:58 2015
[   165.024] (==) Using system config directory "/nix/store/byfwj18c0vqv7z23grqjb4zdjkcdfwp5-xorg-server-1.16.4/share/X11/xorg.conf.d"
[   165.024] (==) No Layout section.  Using the first Screen section.
[   165.024] (==) No screen section available. Using defaults.
[   165.024] (**) |-->Screen "Default Screen Section" (0)
[   165.024] (**) |   |-->Monitor "<default monitor>"
[   165.024] (==) No monitor specified for screen "Default Screen Section".
	Using a default monitor configuration.
[   165.024] (==) Automatically adding devices
[   165.024] (==) Automatically enabling devices
[   165.024] (==) Automatically adding GPU devices
[   165.024] (==) FontPath set to:
	
[   165.024] (==) ModulePath set to "/nix/store/byfwj18c0vqv7z23grqjb4zdjkcdfwp5-xorg-server-1.16.4/lib/xorg/modules"
[   165.024] (II) The server relies on udev to provide the list of input devices.
	If no devices become available, reconfigure udev or disable AutoAddDevices.
[   165.024] (II) Loader magic: 0x80d9c0
[   165.024] (II) Module ABI versions:
[   165.024] 	X.Org ANSI C Emulation: 0.4
[   165.024] 	X.Org Video Driver: 18.0
[   165.024] 	X.Org XInput driver : 21.0
[   165.024] 	X.Org Server Extension : 8.0
[   165.025] (II) systemd-logind: took control of session /org/freedesktop/login1/session/_33
[   165.025] (II) xfree86: Adding drm device (/dev/dri/card0)
[   165.025] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 10 paused 0
[   165.026] (--) PCI:*(0:0:2:0) 8086:0d26:106b:012e rev 8, Mem @ 0xa0000000/4194304, 0x90000000/268435456, I/O @ 0x00001000/64
[   165.026] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[   165.026] (II) LoadModule: "glx"
[   165.027] (II) Loading /nix/store/byfwj18c0vqv7z23grqjb4zdjkcdfwp5-xorg-server-1.16.4/lib/xorg/modules/extensions/libglx.so
[   165.029] (II) Module glx: vendor="X.Org Foundation"
[   165.029] 	compiled for 1.16.4, module version = 1.0.0
[   165.029] 	ABI class: X.Org Server Extension, version 8.0
[   165.029] (==) AIGLX enabled
[   165.029] (==) Matched intel as autoconfigured driver 0
[   165.029] (==) Matched intel as autoconfigured driver 1
[   165.029] (==) Matched modesetting as autoconfigured driver 2
[   165.029] (==) Matched fbdev as autoconfigured driver 3
[   165.029] (==) Matched vesa as autoconfigured driver 4
[   165.029] (==) Assigned the driver to the xf86ConfigLayout
[   165.029] (II) LoadModule: "intel"
[   165.030] (WW) Warning, couldn't open module intel
[   165.030] (II) UnloadModule: "intel"
[   165.030] (II) Unloading intel
[   165.030] (EE) Failed to load module "intel" (module does not exist, 0)
[   165.030] (II) LoadModule: "modesetting"
[   165.030] (WW) Warning, couldn't open module modesetting
[   165.030] (II) UnloadModule: "modesetting"
[   165.030] (II) Unloading modesetting
[   165.030] (EE) Failed to load module "modesetting" (module does not exist, 0)
[   165.030] (II) LoadModule: "fbdev"
[   165.030] (WW) Warning, couldn't open module fbdev
[   165.030] (II) UnloadModule: "fbdev"
[   165.030] (II) Unloading fbdev
[   165.030] (EE) Failed to load module "fbdev" (module does not exist, 0)
[   165.030] (II) LoadModule: "vesa"
[   165.030] (WW) Warning, couldn't open module vesa
[   165.030] (II) UnloadModule: "vesa"
[   165.030] (II) Unloading vesa
[   165.030] (EE) Failed to load module "vesa" (module does not exist, 0)
[   165.030] (EE) No drivers available.
[   165.030] (EE) 
Fatal server error:
[   165.030] (EE) no screens found(EE) 
[   165.030] (EE) 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
[   165.030] (EE) Please also check the log file at "/home/gilligan/.local/share/xorg/Xorg.0.log" for additional information.
[   165.030] (EE) 

I have the same exact issue on a mid 2012 MBP 15" retina. Did specifying videoDrivers = [ "Intel" ]; Solve the problem?