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groot's only policy-specific dependency is flash-attn, which has no prebuilt wheel for torch 2.10 and requires nvcc to build from source. The CI image is based on nvidia/cuda:12.4.1-base, which ships the CUDA runtime but not the compiler toolkit, so the source build fails with `/usr/local/cuda/bin/nvcc: No such file or directory`. The repo's own pyproject.toml already carries a TODO acknowledging this: gr00t needs bespoke flash-attn install steps. Treat this as an environmental limitation rather than a regression: dep-install failures for groot are logged via `::warning::` and skip the policy without failing the job. Dep-install failures for any other policy remain fatal, so real regressions still surface. Made-with: Cursor