{ pkgs, ... }: 

{
      networking.computerName = "cspark-macos-desktop";
      networking.hostName = "cspark-macos-desktop";
      networking.localHostName = "cspark-macos-desktop";
      
      nixpkgs.config.allowUnfree = true;

      # Nix packages.
      environment.systemPackages = with pkgs; [ 
        git
        unrar
	pass
	fastfetch
	neovim
        yt-dlp
	qbittorrent
	emacs
	neovim
        discord
      ];

      # Homebrew configuration and packages.
      homebrew.enable = true;
      # Homebrew formulae
      homebrew.brews = [
      ];
      # Homebrew casks
      homebrew.casks = [
      	  "steam"
	        "librewolf"
	        # "eloston-chromium" # Ungoogled Chromium
          "chromium"
	        # "blackhole-2ch" # Virtual Audio driver that I'm using alongside the builtin Mac audio routing (Multi-Output/Aggregate
      ];

      services.yabai = {
      	enable = true;
	      config = {
		      external_bar                 = "off:40:0";    
    		  menubar_opacity              = 1.0;            
    		  mouse_follows_focus          = "off";            
    		  focus_follows_mouse          = "off";            
    		  display_arrangement_order    = "default";        
    		  window_origin_display        = "default";        
    		  window_placement             = "second_child";   
    		  window_zoom_persist          = "on";             
    		  window_shadow                = "on";             
    		  window_animation_duration    = 0.0;           
    		  window_animation_easing      = "ease_out_circ";  
    		  window_opacity_duration      = 0.0;            
    		  active_window_opacity        = 1.0;            
    		  normal_window_opacity        = 0.90;           
    		  window_opacity               = "off";            
    		  insert_feedback_color        = "0xffd75f5f";     
    		  split_ratio                  = 0.50;           
    		  split_type                   = "auto";           
    		  auto_balance                 = "off";            
    		  top_padding                  = 12;             
    		  bottom_padding               = 12;             
    		  left_padding                 = 12;             
    		  right_padding                = 12;             
    		  window_gap                   = 06;             
    		  layout                       = "bsp";            
    		  mouse_modifier               = "fn";             
    		  mouse_action1                = "move";           
    		  mouse_action2                = "resize";         
    		  mouse_drop_action            = "swap";
	      };
      };
      services.skhd = { 
      	enable = true;
	      skhdConfig = ''
		    cmd - return : open -a Terminal "`pwd`"
	      '';
      };


      # Auto upgrade nix package and the daemon service.
      services.nix-daemon.enable = true;
      # nix.package = pkgs.nix;

      # Necessary for using flakes on this system.
      nix.settings.experimental-features = "nix-command flakes";

      # Create /etc/zshrc that loads the nix-darwin environment.
      # programs.zsh.enable = true;  # default shell on catalina
      # programs.fish.enable = true;
      programs.bash = {
        enable = true;
        enableCompletion = true;
        interactiveShellInit = ''
        export PS1="\[\e[92;40m\]\h\[\e[m\]:\[\e[93m\]\W\[\e[m\] \\$ "
        cd ~
        neofetch
        '';
      };
      environment.shellAliases = {
        edit = "emacs -nw";
        nix-darwin-rebuild-system-flake = "nix run nix-darwin -- switch --flake ~/.config/nix-darwin#desktop";
      };

      # Set Git commit hash for darwin-version.
      system.configurationRevision = self.rev or self.dirtyRev or null;

      # Used for backwards compatibility, please read the changelog before changing.
      # $ darwin-rebuild changelog
      system.stateVersion = 4;

      # The platform the configuration will be used on.
      nixpkgs.hostPlatform = "x86_64-darwin";
    };
  in
  {
    # Build darwin flake using:
    # $ darwin-rebuild build --flake .#Curts-Mac-Pro
    darwinConfigurations = {
      desktop = nix-darwin.lib.darwinSystem {
        specialArgs = {inherit inputs;};
        modules = [
          configuration
        ];
      };
    };

    # Expose the package set, including overlays, for convenience.
    darwinPackages = self.darwinConfigurations.desktop-macos.pkgs;
  };