anchor.diff:  
         enableParallelBuilding = true;
   
  -      nativeBuildInputs = [ pkgconfig autoconf re2c ];
  -      buildInputs = [ flex bison ]
  +      nativeBuildInputs = [ autoconf bison libtool pkgconfig re2c ];
  +      buildInputs = [ ]
           ++ optional (versionOlder version "7.3") pcre
           ++ optional (versionAtLeast version "7.3") pcre2
           ++ optional withSystemd systemd
  
positive.code:   , xmlrpcSupport ? (config.php.xmlrpc or false) && (libxml2Support)
    , cgotoSupport ? config.php.cgoto or false
    , valgrindSupport ? (config.php.valgrind or true) && (versionAtLeast version "7.2")
    , valgrindPcreSupport ? (config.php.valgrindPcreSupport or false) && (valgrindSupport) && (versionAtLeast version "7.2")
    }:
  
      let
  
negative.code:       ++ optional (!pharSupport) "--disable-phar"
        ++ optional xmlrpcSupport "--with-xmlrpc"
        ++ optional cgotoSupport "--enable-re2c-cgoto"
        ++ optional valgrindSupport "--with-valgrind=${valgrind.dev}";
  
        hardeningDisable = [ "bindnow" ];
  
  