Installed cuda 8.0, got 7.5

I’m on Ubuntu 16.04 and I downloaded the .run from the CUDA downloads page twice. Both installations, CUDA was installed successfully, but when I run the command nvcc -v, nvcc says I have version 7.5. I have a gtx 1080 on driver 375.66 which should support cuda 8.0. How can I get cuda 8.0?

probably your PATH environment variable is not properly set up. At the end of the runfile installer, it prints out a message that indicates that this variable needs to be set up, as well as in the install guide:

I thought I set my PATH up correctly; I opened the file that the PATH variable is stored in and manually edited that instead. Do you know if that should work?