Solved by mrshenli in post #4 
              
              
                Hey @Purvak-L, you can cd to the NCCL submodule in the third party folder in https://github.com/pytorch/pytorch/tree/master/third_party/nccl and manually update the nccl module there. 
Another option is to install 2.7.6 locally and set USE_SYSTEM_NCCL=1 when building PyTorch. See this issue: https:/…