anchor.diff:  { stdenv, fetchurl, dpkg
   , alsaLib, atk, cairo, cups, curl, dbus, expat, fontconfig, freetype, gdk-pixbuf, glib, glibc, gnome2, gnome3
   , gtk3, libnotify, libpulseaudio, libsecret, libv4l, nspr, nss, pango, systemd, wrapGAppsHook, xorg
  -, at-spi2-atk }:
  +, at-spi2-atk, libuuid, at-spi2-core }:
   
   let
   
  
positive.code:     glib
      glibc
      libsecret
  
      gnome2.GConf
      gdk-pixbuf
  
negative.code:     alsaLib
      atk
      at-spi2-atk
      at-spi2-core
      cairo
      cups
      curl
  