anchor.diff:          callPackage ../os-specific/linux/aufs/3.nix { }
         else null;
   
  -    aufs_util = 
  +    aufs_util =
         if kernel.features ? aufs2 then
           callPackage ../os-specific/linux/aufs-util/2.nix { }
         else if kernel.features ? aufs2_1 then
  
positive.code:   };
  
    drbd = callPackage ../os-specific/linux/drbd { };
    
    libuuid =
      if crossSystem != null && crossSystem.config == "i586-pc-gnu"
      then (utillinuxng // {
  
negative.code:       else if kernel.features ? aufs3 then
          callPackage ../os-specific/linux/aufs-util/3.nix { }
        else null;
  
      blcr = callPackage ../os-specific/linux/blcr {
        #libtool = libtool_1_5; # libtool 2 causes a fork bomb
      };
  