anchor.diff:  #
   #    bbswitch = callPackage ../os-specific/linux/bbswitch {};
   #
  -#    ati_drivers_x11 = callPackage ../os-specific/linux/ati-drivers { };
  +    ati_drivers_x11 = callPackage ../os-specific/linux/ati-drivers { };
   #
   #    blcr = callPackage ../os-specific/linux/blcr { };
   #
  -#    cryptodev = callPackage ../os-specific/linux/cryptodev { };
  +    cryptodev = callPackage ../os-specific/linux/cryptodev { };
   #
   #    cpupower = callPackage ../os-specific/linux/cpupower { };
   #
  -#    e1000e = callPackage ../os-specific/linux/e1000e {};
  +    e1000e = callPackage ../os-specific/linux/e1000e {};
   #
   #    v4l2loopback = callPackage ../os-specific/linux/v4l2loopback { };
   #
  
positive.code: #     cross_renaming: we should make all programs use pkgconfig as
  #     nativeBuildInput after the renaming.
  #     */
  #  pkgconf = forceNativeDrv (callPackage ../development/tools/misc/pkgconf { });
  #  pkg-config = forceNativeDrv (callPackage ../development/tools/misc/pkgconfig { });
  #  pkgconfig = pkgconf;
  #
  #  prelink = callPackage ../development/tools/misc/prelink { };
  #
  
negative.code: #
  #  ### DEVELOPMENT / PERL MODULES
  #
    buildPerlPackage = callPackage ../development/perl-modules/generic perl;
  
    perlPackages = recurseIntoAttrs (callPackage ./perl-packages.nix {
      overrides = (config.perlPackageOverrides or (p: {})) pkgs;
    });
  
    perlXMLParser = perlPackages.XMLParser;
  
  #  ack = perlPackages.ack;
  #
  #  perlArchiveCpio = perlPackages.ArchiveCpio;
  