gistfile1.txt

{ config, pkgs, lib, ... }:
let
  cleverca22-nixos-configs = pkgs.fetchFromGitHub
  { owner = "cleverca22";
    repo = "nixos-configs";
    rev = "bd0d30c6ac0c0d40f295fda9675338b832dd317b";
    sha256 = "1y1jpfcjwyla0vziih6xqhd98imyc3glmxzyg36xkh5hjpnmi6l6";
  };
in
{
  imports = [
    # Get a module for using qemu-user-{arm,aarch64} via binfmt misc to run                                                                                                                                                                                                    
    # arm binaries.  This is useful for cross-compiling to arm.                                                                                                                                                                                                                
    "${cleverca22-nixos-configs}/qemu.nix"
  ];

  # Via the cleverca22/nixos-configs module, enable qemu execution of arm and                                                                                                                                                                                                  
  # aarch64 via binfmt misc.                                                                                                                                                                                                                                                   
  qemu-user = {
    arm = true;
    aarch64 = true;
  };

  nix.distributedBuilds = true;

  # Use the systemd-boot EFI boot loader.                                                                                                                                                                                                                                      
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  boot.extraModulePackages = with config.boot.kernelPackages; [
    # Support tlp.  Without this:                                                                                                                                                                                                                                              
    # "Error: ThinkPad battery features not available."                                                                                                                                                                                                                        
    acpi_call
  ];

  # This value determines the NixOS release with which your system is to be                                                                                                                                                                                                    
  # compatible, in order to avoid breaking some software such as database                                                                                                                                                                                                      
  # servers. You should change this only after NixOS release notes say you                                                                                                                                                                                                     
  # should.                                                                                                                                                                                                                                                                    
  system.stateVersion = "19.03"; # Did you read the comment?                                                                                                                                                                                                                   
}