anchor.diff:  , elementary-icon-theme
   , wingpanel-with-indicators
   , elementary-gtk-theme
  -, elementary-settings-daemon
   , nixos-artwork
   , lightdm
   , gdk-pixbuf
  
positive.code:   pname = "elementary-greeter";
    version = "6.0.1";
  
    repoName = "greeter";
  
    src = fetchFromGitHub {
      owner = "elementary";
      repo = repoName;
      rev = version;
      sha256 = "1f606ds56sp1c58q8dblfpaq9pwwkqw9i4gkwksw45m2xkwlbflq";
    };
  
negative.code:       # dbus-launch needed in path
        --prefix PATH : "${dbus}/bin"
  
        # for `io.elementary.wingpanel -g`
        --prefix PATH : "${wingpanel-with-indicators}/bin"
  
        # for the compositor
  