CUDA version mismatch: GPU, Toolkit, VS project?

I need to build a project in Visual Studio 2017 that has optional CUDA 8.0 support. No luck so far. My GPU has a CUDA compute capability of 6.1. The installed CUDA Toolkit version is 9.1. Should I uninstall 9.1 and install 8.0 instead?

Update: OK, I found this thread that explanains my woes. Visual Studio 2015 tools are still required to build CUDA-enabled applications on Windows 10.