[PyQt] Runtime error with PyQt-5.8

[Baz Walter]

After building PyQt-5.8 with sip-4.19.1 I get the following runtime error:

>>> from PyQt5 import QtCore
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
RuntimeError: the sip module implements API v12.0 but the PyQt5.QtCore 
module requires API v12.1

How can the PyQt5 API version be higher if I built it using the latest 
version of sip?

-- 
Regards
Baz Walter