Solved by ptrblck in post #2 
              
              
                If you’ve installed the PyTorch binaries via conda, you should fine some files in your conda directory, e.g.: 
/opt/conda/lib/python3.6/site-packages/torch/include/...

However, modifying them won’t have any effect. 
Instead, you should build PyTorch from source as described here. 
Also, the Contrib…