anchor.diff:      sha256 = "0drw16wm95dqszpl7j33y4gckz0w0107lnz6wkzb66f0dlbv48cf";
     };
   
  +  enableParallelBuilding = true;
  +
     patchPhase = ''
       patchShebangs configure
       patchShebangs config.sub
  
positive.code:     description = "AVS encoder and decoder";
      homepage    = http://xavs.sourceforge.net/;
      license     = licenses.lgpl2;
      platforms   = platforms.linux;
      maintainers = with maintainers; [ codyopel ];
    };
  }
  
negative.code:     patchShebangs tools/patcheck
      patchShebangs tools/regression-test.pl
      patchShebangs tools/xavs-format
      '' + stdenv.lib.optionalString stdenv.isDarwin ''
      substituteInPlace config.guess --replace 'uname -p' 'uname -m'
      substituteInPlace configure \
        --replace '-O4' '-O3' \
        --replace ' -s ' ' ' \
        --replace 'LDFLAGS -s' 'LDFLAGS' \
        --replace '-dynamiclib' ' ' \
        --replace '-falign-loops=16' ' '
      substituteInPlace Makefile --replace '-Wl,-soname,' ' '
      '';
  
    configureFlags = [
      "--enable-pic"
  