anchor.diff:      };
       windowManager = {
         i3.enable = true;
  +      i3.package = pkgs.i3-gaps;
       };
     };
     # services.xserver.xkbOptions = "eurosign:e";
  
positive.code:   #networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
      
    # Enable NVidia driver support
    nixpkgs.config.allowUnfree = true;
    #iservices.xserver.videoDrivers = [ "nvidia" ];
    
    # Configure network proxy if necessary
  
negative.code:       startAgent = true;
      };
    };
    nixpkgs.config = {
      allowUnfree = true;
      packageOverrides = pkgs: rec {
        polybar = pkgs.polybar.override {
          i3GapsSupport = true;
          mpdSupport = true;
          alsaSupport = true;
          pulseSupport = true;
          nlSupport = true;
        };
      };
    };
    # Enable sound.
    sound.enable = true;
    hardware.pulseaudio.enable = true;
  