SQL> connect sys / as sysdba
Enter password:
Connected.
SQL> grant execute on LT_EXPORT_PKG to system;

Grant succeeded.
SQL> connect system/xxxxxxxx
Connected.

SQL> select owner,object_name,status
2 from dba_objects
3 where OWNER = 'SYS' and OBJECT_NAME = 'SYS.LT_EXPORT_PKG';

no rows selected