anchor.diff:        makes it possible to handle many data-reformatting jobs with just a few
         lines of code.
       '';
  -
       license = licenses.gpl3Plus;
  -
       platforms = platforms.unix ++ platforms.windows;
  -
       maintainers = [ ];
     };
   }
  
positive.code: 
  assert (doCheck && stdenv.isLinux) -> glibcLocales != null;
  
  let
    inherit (lib) optional;
  in
  stdenv.mkDerivation rec {
    pname = "gawk";
    version = "5.1.0";
  
negative.code:   meta = with lib; {
      homepage = "https://www.gnu.org/software/gawk/";
      description = "GNU implementation of the Awk programming language";
      longDescription = ''
        Many computer users need to manipulate text files: extract and then
        operate on data from parts of certain lines while discarding the rest,
  