PWCNet not working

I am trying to setup PWCNet for optical flow extraction using PyTorch, from this link:

After following the steps in ReadMe it says
ImportError(“torch.utils.ffi is deprecated. Please use cpp extensions instead”)
On this link they say so there is no easy solution to this? it looks like it requires a full revamp of the code that used to work for pytorch <= 0.4.1
But the code is written in PyTorch 0.2

Neither I am able to install cudatoolkit 8.0 using conda as mentioned in the ReadMe.