Hash type 'blowfish' (BCrypt) provides the facility to specify the version of the BCrypt algorithm
The filter `password_hash` produces different results depending on whether you installed `passlib` or not.
To ensure idempotency, specify `rounds` to be neither `crypt`'s nor `passlib`'s default, which is `5000` for `crypt` and a variable value (`535000` for sha256, `656000` for sha512) for `passlib`: