anchor.diff:    firefox35Pkgs = {
       firefox = prio 150 linux;
     };
  -  
  +
     firefox36Pkgs = {
       firefox = linux;
     };
  -  
  +
     gnome = {
       gnome_panel = linux;
       metacity = linux;
  
positive.code:     virtualbox = linux;
      virtualboxGuestAdditions = linux;
    };
    
    linuxPackages_2_6_28 = {
      aufs = linux;
      kernel = linux;
  
negative.code:   pythonPackages = {
      zfec = linux;
    };
  
    xorg = {
      fontadobe100dpi = linux;
      fontadobe75dpi = linux;
  