/// $PackageInfo: require_system("arch") pcre
/// $PackageInfo: require_system("centos") pcre-devel
-/// $PackageInfo: require_system("darwin") pcre
+/// $PackageInfo: require_system("darwin") pcre
/// $PackageInfo: require_system("debian") libpcre3-dev
/// $PackageInfo: require_system("ubuntu") libpcre3-dev