anchor.diff:  nautilus_3-22 = callPackage ../all-pkgs/n/nautilus {
     channel = "3.22";
     adwaita-icon-theme = pkgs.adwaita-icon-theme_3-24;
  -  atk = pkgs.atk_2-22;
  +  atk = pkgs.atk_2-24;
     gdk-pixbuf = pkgs.gdk-pixbuf_2-36;
     gnome-desktop = pkgs.gnome-desktop_3-22;
     gsettings-desktop-schemas = pkgs.gsettings-desktop-schemas_3-24;
  
positive.code: 
  mutter_3-22 = callPackage ../all-pkgs/m/mutter {
    channel = "3.22";
    atk = pkgs.atk_2-22;
    gdk-pixbuf = pkgs.gdk-pixbuf_2-36;
    gnome-desktop = pkgs.gnome-desktop_3-22;
    #gnome-settings-daemon = pkgs.gnome-settings-daemon_3-22;
  
negative.code: 
  vte_0-46 = callPackage ../all-pkgs/v/vte {
    channel = "0.46";
    atk = pkgs.atk_2-24;
    gdk-pixbuf_unwrapped = pkgs.gdk-pixbuf_unwrapped_2-36;
    vala = pkgs.vala_0-34;
  };
  