could you pls answer more detail , if I have cmake3.12 in my home path ,like /home/somebody/install_cmak/bin/cmake_3.12 ,otherwise ,  cmake_2.8 is preserved by system .
how can I use specific cmake path in python setup.py ?
CMAKE_ROOT=/home/somebody/install_cmak/ CMAKE_VERSION=cmake3 python setup.py installl

it’s not right ,I had tested.