As far as I can tell it needs both the python.exe directory and the python directory/python3.XX after unzipping python3.XX.zip where the modules are present in the path, but I do not see a way to set ...

The libdir should be libdir=/home/ondrej/.tsan-gcc-14/lib or if the script is smart it could become libdir=${exec_prefix}/lib. This completely breaks installations to non-default paths (I have ...