anchor.diff:    postInstall = ''
       ln -sv mariadb_config "$out"/bin/mysql_config
       ln -sv mariadb "$out"/include/mysql
  -    ln -sv libmariadb.so "$out"/lib/libmysqlclient.so
     '';
   
     meta = with stdenv.lib; {
  
positive.code:     owner = "MariaDB";
      repo = "mariadb-connector-c";
      inherit rev;
      sha256 = "00898eda42dce5a432336fbfdbac71e7e3af81799b1afcd70667be88aada7749";
    };
  
    nativeBuildInputs = [
  
negative.code: }:
  
  let
    rev = "3f356c0598ad4785e9b4eff23e03fd662a701070";
    date = "2017-07-07";
  in
  stdenv.mkDerivation rec {
    name = "mariadb-connector-c-${date}";
  