anchor.diff:    makeFlags = "MAN1DIR=share/man/man1";
   
     enableParallelBuilding = true;
  -  
  +
     meta = {
       license = "GPLv2+";
       homepage = "http://doxygen.org/";
  
positive.code:     '';
  
      maintainers = [stdenv.lib.maintainers.simons];
      platforms = stdenv.lib.platforms.unix;
    };
  }
  
negative.code: { stdenv, fetchurl, perl, flex, bison, qt }:
  
  let
    name = "doxygen-1.7.4";
  in
  stdenv.mkDerivation {
    inherit name;
  
    src = fetchurl {
      url = "ftp://ftp.stack.nl/pub/users/dimitri/${name}.src.tar.gz";
  