I tried to build these versions from the source and still get build failure. For example building 3.6.9 from source results in the following. ./configure checking build system type... arm-apple-darwin21.4.0 checking host system type... arm-apple-darwin21.4.0 checking for python3.6... no checking for python3... python3 checking for --enable-universalsdk... no checking for --with-universal-archs... no checking MACHDEP... darwin checking for --without-gcc... no checking for --with-icc... no checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /usr/bin/grep checking for a sed that does not truncate output... /usr/bin/sed checking for --with-cxx-main=... no checking for g++... no configure: By default, distutils will build C++ extension modules with "g++". If this is not intended, then set CXX on the configure command line. checking for the platform triplet based on compiler characteristics... darwin configure: error: internal configure error for the platform triplet, please file a bug report