Compile/Install QtWebEngine on Raspbian Bullseye fails

[chris321]

Hi
I downloaded sources PyQt5 5.15.0 from pypi.org. PyQt5 went fine.
PyQtWebEngine-5.15.0 with sip-build --no-make --verbose
Querying qmake about your Qt installation...
/usr/bin/qmake -query
These bindings will be built: QtWebEngineCore, QtWebEngine, QtWebEngineWidgets.
Generating the QtWebEngineCore bindings...
Generating the QtWebEngine bindings...
Generating the QtWebEngineWidgets bindings...
Generating the .pro file for the QtWebEngineCore module...
Generating the .pro file for the QtWebEngine module...
Generating the .pro file for the QtWebEngineWidgets module...
Generating the top-level .pro file...
Generating the Makefiles...
/usr/bin/qmake -recursive PyQtWebEngine.pro
Info: creating stash file /home/pi/Downloads/PyQtWebEngine-5.15.0/build/.qmake.stash
Reading /home/pi/Downloads/PyQtWebEngine-5.15.0/build/QtWebEngineCore/QtWebEngineCore.pro
Project ERROR: Unknown module(s) in QT: webenginecore
sip-build: '/usr/bin/qmake -recursive PyQtWebEngine.pro' failed returning 3

What am I missing?
The raspbian is the lite version. Instructions from:
[https://www.riverbankcomputing.com/static/Docs/PyQt5/installation.html#building-and-installing-from-source](link url)

Regards
chris