diff -rupN --no-dereference qgis-3.18.3/cmake/PyQtMacros.cmake qgis-3.18.3-new/cmake/PyQtMacros.cmake
--- qgis-3.18.3/cmake/PyQtMacros.cmake 2021-05-14 14:10:19.000000000 +0200
+++ qgis-3.18.3-new/cmake/PyQtMacros.cmake 2021-05-16 09:54:32.907014158 +0200
@@ -36,7 +36,7 @@ MACRO(PYQT_WRAP_UI outfiles )
ELSE(CMAKE_HOST_WIN32)
# TODO osx
SET(PYUIC_WRAPPER "${CMAKE_SOURCE_DIR}/scripts/pyuic_wrapper.sh")
- SET(PYUIC_WRAPPER_PATH "${QGIS_OUTPUT_DIRECTORY}/lib")
+ SET(PYUIC_WRAPPER_PATH "${QGIS_OUTPUT_DIRECTORY}/lib${LIB_SUFFIX}")
ENDIF(CMAKE_HOST_WIN32)
FOREACH(it ${ARGN})