How does Traditional CMake Set-Up work

[Jiboxiake]

Update: I can cmake --build targeting /build/abseil-cpp but then it will not find the tests in the next step.

Hello, I am trying to install Abseil for Google S2 Geometry. It leads me to https://github.com/abseil/abseil-cpp/blob/master/CMake/README.md#traditional-cmake-set-up but I'm really confused what am I supposed to do here. I originally followed the quickstart with CMake and installed and passed all the tests. I have installed and built googletest following the command in the link, and then configured Abseil but got stuck at cmake --build /temporary/build/abseil-cpp. It keeps saying /temporary/build/abseil-cpp is not a directory. Thanks in advance.