gistfile1.txt

  boot = {
    crashDump = {
      enable = false;
    };
    tmpOnTmpfs = false;
    loader.efi = {
      efiSysMountPoint = "/boot/EFI/";
      canTouchEfiVariables = true;
    };
    loader.grub = {
      efiInstallAsRemovable = false;
      efiSupport = true;
      memtest86.enable = true;
      version = 2;
      enable = true;
      device = "/dev/sda";
      extraEntries = ''
        menuentry "Windows 7" {
          insmod part_gpt
          insmod chain
          set root="hd1,msdos1"
          chainloader +1
        } 
      '';
    };