CMake 3.17 Policy CMP0100 Problem

When running the CI pipeline for current master, that successfully passed in the past https://www.graphics.rwth-aachen.de:9000/OpenFlipper-Free/OpenFlipper-Free/pipelines/13920, now it fails on mac: https://www.graphics.rwth-aachen.de:9000/OpenFlipper-Free/OpenFlipper-Free/pipelines/14006

 [ 31%] Building CXX object OpenFlipper/libs_required/ACG/CMakeFiles/ACG.dir/QtWidgets/QtClippingDialog.cc.o
 In file included from /Users/jenkins/builds/8dfb9a4a/0/OpenFlipper-Free/OpenFlipper-Free/OpenFlipper/libs_required/ACG/QtWidgets/QtClippingDialog.cc:55:
 /Users/jenkins/builds/8dfb9a4a/0/OpenFlipper-Free/OpenFlipper-Free/OpenFlipper/libs_required/ACG/QtWidgets/QtClippingDialog.hh:60:10: fatal error: 'ui_QtClippingDialogUi.h' file not found
 #include "ui_QtClippingDialogUi.h"
          ^
 1 error generated.