anchor.diff:        prints the matching lines.
       '';
   
  -    license = stdenv.lib.licenses.gpl3Plus;
  +    license = licenses.gpl3Plus;
   
  -    maintainers = [ stdenv.lib.maintainers.eelco ];
  -    platforms = stdenv.lib.platforms.all;
  +    maintainers = [ maintainers.eelco ];
  +    platforms = platforms.all;
     };
   
     passthru = {inherit pcre;};
  
positive.code:       chmod +x $out/bin/egrep $out/bin/fgrep
      '';
  
    meta = {
      homepage = http://www.gnu.org/software/grep/;
      description = "GNU implementation of the Unix grep command";
  
  
negative.code: 
    patches = [ ./cve-2015-1345.patch ];
  
    outputs = [ "out" "info" ]; # the man pages are rather small
  
    buildInputs = [ pcre xz.bin libiconv ];
  
  