anchor.diff:        enable = true;
   
         # Use LightDM.
  -      displayManager = {
  +      displayManager = with pkgs; {
           lightdm = {
             enable = true;
             greeters = {
  
positive.code:           package = pkgs.i3-gaps;
            # i3 dependencies.
            extraPackages = with pkgs; [
              (python3Packages.py3status.overrideAttrs (oldAttrs: {
                propagatedBuildInputs = oldAttrs.propagatedBuildInputs ++ [
                  python3Packages.i3ipc
                  python3Packages.pydbus
                  python3Packages.pygobject3
                ];
              }))
              compton-git
              dex
              dunst
  
negative.code:               enable = true;
                clock-format = "%a %d/%m %H:%M:%S";
                iconTheme = {
                  package = arc-icon-theme;
                  name = "Arc";
                };
                indicators = [ "~clock" "~session" "~power" ];
                theme = {
                  package = arc-theme;
                  name = "Arc-Dark";
                };
              };
  