anchor.diff:    };
   
     environment.systemPackages = (with pkgs; [
  -    rsync openssh git pijul neovim gnupg smartmontools qemu
  +    rsync openssh git neovim gnupg smartmontools # qemu pijul 
       nmap tcpdump dnsutils traceroute
       file htop tree hexd pixd xsel maim xdotool rlwrap
       latinmodern-math lmodern gummi texlive.combined.scheme-full
       signal-desktop quasselClient
  -    gimp darktable krita 
  -    zeal mpv firefox
  -    mathematica jupyter
  -    python3 ghc jq dash nodejs racket
  -    virtualbox # arduino
  +    # gimp darktable krita # Harumph.
  +    mpv firefox # zeal
  +    # mathematica jupyter # I don't _really_ need either of these. Probably.
  +    python3 ghc jq dash nodejs racket # All the languages!
  +    # virtualbox # arduino
       nix-index # plover.dev
  -    gnuradio gqrx gnuradio-osmosdr gqrx rtl-sdr
  +    # gnuradio gqrx gnuradio-osmosdr gqrx rtl-sdr
     ]) ++ (with pkgs.gnome3; [
       gnome-terminal gnome-disk-utility
  -    gnome-logs gnome-system-log
  +    # gnome-logs gnome-system-log
       gnome-power-manager simple-scan
       nautilus file-roller
       eog evince
  -    baobab gnome-system-monitor gnome-session
  -    gnome-font-viewer gnome-characters gnome-screenshot
  -    gnome-clocks gnome-weather
  +    gnome-session
  +    # baobab gnome-system-monitor
  +    gnome-screenshot # gnome-characters gnome-font-viewer
  +    # gnome-clocks gnome-weather
     ]);
   
     # RTL-SDR
  -  services.udev.packages = [ pkgs.rtl-sdr ];
  +  # services.udev.packages = [ pkgs.rtl-sdr ];
   
     # Package comfort.
     nixpkgs.config.packageOverrides = pkgs: with pkgs; {
  
positive.code: 
    # Virtualization.
    boot.kernelModules = [ "kvm-intel" ];
    virtualisation.virtualbox.host.enable = true;
  
    # ZFS services.
    services.zfs.autoSnapshot.enable = true;
  
negative.code:         [org.gnome.desktop.interface]
          clock-show-seconds=true
    
          [org.gnome.shell.overrides]
          dynamic-workspaces=false
  
          [org.gnome.desktop.wm.preferences]
          num-workspaces=9
  
          [org.gnome.desktop.wm.keybindings]
          move-to-workspace-1=['<Super><Shift>1']
          move-to-workspace-2=['<Super><Shift>2']
  