anchor.diff:    alsaPlugins = callPackage ../os-specific/linux/alsa-plugins {
       jackaudio = null;
     };
  -  
  +
     alsaPluginWrapper = callPackage ../os-specific/linux/alsa-plugins/wrapper.nix { };
   
     alsaUtils = callPackage ../os-specific/linux/alsa-utils { };
  
positive.code:   libaio = callPackage ../os-specific/linux/libaio { };
  
    libatasmart = callPackage ../os-specific/linux/libatasmart { };
    
    libcgroup = callPackage ../os-specific/linux/libcg { };
  
    libnl = callPackage ../os-specific/linux/libnl { };
  
negative.code:   udev = udev172;
  
    udisks = callPackage ../os-specific/linux/udisks { };
  
    uml = import ../os-specific/linux/kernel/linux-2.6.29.nix {
      inherit fetchurl stdenv perl mktemp module_init_tools;
      userModeLinux = true;
  