anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "elementary-greeter";
  -  version = "5.0.4";
  +  version = "6.0.0";
   
     repoName = "greeter";
   
  
positive.code:     elementary-gtk-theme
      elementary-icon-theme
      elementary-settings-daemon
      gdk-pixbuf
      granite
      gtk3
      libgee
      lightdm
      mutter
      wingpanel-with-indicators
  
negative.code: , gtk3
  , granite
  , libgee
  , libhandy
  , gnome-settings-daemon
  , mutter
  , elementary-icon-theme
  , wingpanel-with-indicators
  , elementary-gtk-theme
  , elementary-settings-daemon
  , nixos-artwork
  , lightdm
  , gdk-pixbuf
  