pyside does not build on apple silicon

On an Apple Mac Mini M1 (Apple Silicon):

In a terminal where I can configure qtbase successfully, I cannot configure pyside.

I set the environment variable "DEVELOPER_DIR".

Configuring qtbase with "make -GNinja ../qtbase" leads to qtbase-configure-out.txt

Trying to configure pyside with

python setup.py install \
     --qmake=/Users/andreasbuhr/development/qtdev/qtbase/cmake-build-debug/bin/qmake \
     --ignore-git \
     --debug \
     --reuse-build \
     --build-tests \
     --verbose-build \
     --module-subset=Core,Gui,Widgets

leads to pyside-configure-out.txt