anchor.diff:  #    ruby = ruby_2_2_2;
   #  };
   #
  -#  gdb = callPackage ../development/tools/misc/gdb {
  -#    guile = null;
  -#    hurd = gnu.hurdCross;
  -#    inherit (gnu) mig;
  -#  };
  +  gdb = callPackage ../development/tools/misc/gdb {
  +    guile = null;
  +    hurd = gnu.hurdCross;
  +    inherit (gnu) mig;
  +  };
   #
   #  gdbGuile = lowPrio (gdb.override { inherit guile; });
   #
  
positive.code: #
  #  ogrepaged = callPackage ../development/libraries/ogrepaged { };
  #
  #  oniguruma = callPackage ../development/libraries/oniguruma { };
  #
    openal = openalSoft;
    openalSoft = callPackage ../development/libraries/openal-soft { };
  #
  
negative.code: #
  #  apparix = callPackage ../tools/misc/apparix { };
  #
    appdata-tools = callPackage ../tools/misc/appdata-tools { };
  
    asciidoc = callPackage ../tools/typesetting/asciidoc {
      inherit (pythonPackages) matplotlib numpy aafigure recursivePthLoader;
      w3m = w3m-batch;
  