anchor.diff:    };
   
     wt4 = generic {
  -    version = "4.2.0";
  -    sha256 = "0zrrdjz0sa8hrmybjp4aap1lcqcqvsicd7dj49zj1m5k8gnfpm4v";
  +    version = "4.5.0";
  +    sha256 = "16svzdma2mc2ggnpy5z7m1ggzhd5nrccmmj8xnc7bd1dd3486xwv";
     };
   }
  
positive.code:         "-DWT_WRASTERIMAGE_IMPLEMENTATION=GraphicsMagick"
          "-DGM_PREFIX=${graphicsmagick}"
        ]
        ++ lib.optional (harfbuzz != null)
          "-DHARFBUZZ_INCLUDE_DIR=${harfbuzz.dev}/include"
        ++ lib.optional (libmysqlclient != null)
          "-DMYSQL_PREFIX=${libmysqlclient}";
  
  
negative.code:       buildInputs = [
          boost doxygen qt48Full libharu
          pango fcgi firebird libmysqlclient postgresql graphicsmagick glew
          openssl pcre harfbuzz
        ];
  
        cmakeFlags = [
  