Problems with PyQt5 on Raspi 5 / Debian Bookworm

[ullix]

qt5-qmake (5.15.8) is present in the repositories, but was NOT 
installed. After installing it I could start pip-installing pyqt5, but 
it ended with a "Killed". Nothing got installed.

On the previous version of Raspi OS (based on Debian 11, bullseye) the 
qt5-make (5.15.2) was installed by default, but pip-installing pyqt5 
ended with the very same "Killed".

*
*

*Terminal-output on Raspi 5 (Debian 12, bookworm):*

ullix at raspberrypi:~ $ source vGL/bin/activate

(vGL) ullix at raspberrypi:~ $ pip install -U pyqt5
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting pyqt5
   Using cached PyQt5-5.15.10.tar.gz (3.2 MB)
   Installing build dependencies ... done
   Getting requirements to build wheel ... done
   Preparing metadata (pyproject.toml) ... -Killed

(vGL) ullix at raspberrypi:~ $ pip show pyqt5
WARNING: Package(s) not found: pyqt5
(vGL) ullix at raspberrypi:~ $ deactivate

ullix at raspberrypi:~ $ pip show pyqt5
Name: PyQt5
Version: 5.15.9
Summary: Python bindings for the Qt cross platform application toolkit
Home-page: https://www.riverbankcomputing.com/software/pyqt/
Author: Riverbank Computing Limited
Author-email: info at riverbankcomputing.com
License: GPL v3
Location: /usr/lib/python3/dist-packages
Requires: PyQt5-sip
Required-by:


Am 18.12.23 um 15:21 schrieb Charles:
> The last trace of your exception mentions qmake. Building pyqt5 
> requires qt5 to be installed. So the question is, do you have qmake 
> (qt5-qmake) installed or not?
>
> On Fri, Dec 15, 2023 at 11:23 PM ullix <ullix at urkam.de> wrote:
>
>     I got the new Raspi 5 and tested a few things. I used pip to
>     install/modify a dozen packages, and all worked except for *PyQt5.*
>
>     PyQt5 had been apt-installed as version 5.15.9, and worked in
>     tests of mine. But what failed was when trying to upgrade to
>     5.15.10. After closer instepction I apt-removed the apt-installed
>     PyQt5, and tried to pip-install that very same version. It failed
>     with :
>
>       Preparing metadata (pyproject.toml): started
>       Preparing metadata (pyproject.toml): finished with status 'error'
>
>     Full error report in attached file.
>
>     After reinstalling 'python3-pyqt5' via apt, it worked again.
>
>     Where is the problem: Raspi, Debian, pip, pyqt5?
>
>     ullix
>
>
>     On Raspi 5 I used the default OS install:
>
>
>           Raspberry Pi OS with desktop
>
>       * Release date: December 5th 2023
>       * System: 64-bit
>       * Kernel version: 6.1
>       * Debian version: 12 (bookworm)
>
>
>
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