verl/trainer/runtime_env.yaml

working_dir: ./
excludes: ["/.git/"]
env_vars:
  TORCH_NCCL_AVOID_RECORD_STREAMS: "1"
  # If you are using vllm<=0.6.3, you might need to set the following environment variable to avoid bugs:
  # VLLM_ATTENTION_BACKEND: "XFORMERS"