Error after commit

[it-can]

This error started happening when this commit was made: fuel/core@8f4c280

also see fuel/core#1950

Error occurs on this line: https://github.com/fuel/auth/blob/1.8/develop/classes/auth/login/driver.php#L191

Fatal error: Class 'PHPSecLib\Crypt_Hash' not found in /fuel/packages/auth/classes/auth/login/driver.php on line 191

After I changed it to phpseclib\Crypt\Hash I get this error

Fatal error: Call to undefined method phpseclib\Crypt\Hash::pbkdf2() in /fuel/packages/auth/classes/auth/login/driver.php on line 181