Hi @Feywell, I did not quite get what issue are you facing.
If you have the same problem (i.e, training freezes because of some deadlock) then try upgrading your pytorch to the latest pytorch-nightly. It uses the NCCL submodule version 2.7.6
To install pytorch-nightly from conda, refer to pytorch official website 11.
If the issue is that you installed pytorch-nightly using conda but the nccl version is still 2.4.8 then can you please mention the command that you are using to install pytorch-nightly from conda?