anchor.diff:  #  gnustep-make = callPackage ../development/tools/build-managers/gnustep/make { };
   #  gnustep-xcode = callPackage ../development/tools/build-managers/gnustep/xcode { };
   #
  -  devicemapper = lvm2;
  -#
   #  disk_indicator = callPackage ../os-specific/linux/disk-indicator { };
   #
   #  dmidecode = callPackage ../os-specific/linux/dmidecode { };
  
positive.code: #
    rng_tools = callPackage ../tools/security/rng-tools { };
  #
  #  rsnapshot = callPackage ../tools/backup/rsnapshot {
  #    logger = utillinux;
  #  };
  #
  #  rlwrap = callPackage ../tools/misc/rlwrap { };
  #
  
negative.code: #
  #  lessc = callPackage ../development/compilers/lessc { };
  #
    llvmPackages = recurseIntoAttrs (callPackageAlias "llvmPackages_37" { });
  #
    llvmPackages_37 = callPackage ../development/compilers/llvm/3.7 {
      inherit (stdenvAdapters) overrideCC;
  