unixODBCDrivers.mariadb: fix build on darwin

    buildInputs = [ unixODBC openssl libiconv zlib ]

      ++ lib.optionals stdenv.isDarwin [ libkrb5 ];

    preConfigure = ''

    # TODO: remove preConfigure on staging

    preConfigure = if !stdenv.isDarwin then ''

      # we don't want to build a .pkg

      substituteInPlace CMakeLists.txt \

        --replace "IF(APPLE)" "IF(0)" \

        --replace "CMAKE_SYSTEM_NAME MATCHES AIX" "APPLE"

    '';

    '' else null;

    cmakeFlags = [

      "-DWITH_EXTERNAL_ZLIB=ON"

      "-DWITH_IODBC=OFF"

    ];

    buildFlags = if stdenv.isDarwin then [ "maodbc" ] else null;

    installTargets = if stdenv.isDarwin then [ "install/fast" ] else null;

    # see the top of the file for an explanation

    passthru = {

      fancyName = "MariaDB";