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Note for --no-build-isolation for CUDA version mismatch #1437

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Note for --no-build-isolation for CUDA version mismatch #1437

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note for no build isolation
mnabian Feb 23, 2026
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update readme
mnabian Feb 25, 2026
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Merge branch 'main' into mnabian/no-isolation-build
mnabian Feb 26, 2026
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Expand Up @@ -409,6 +409,11 @@ For a CUDA 12 environment, replace `cu13` with `cu12`:
uv sync --extra cu12 --extra nn-extras
```

> **Note:** If you encounter a CUDA version mismatch (e.g., "The detected
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@ktangsali ktangsali Feb 23, 2026

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I think we should refine the language here - --no-build-isolation should be the way to install these packages correctly. Without that, it can cause a version mismatch.

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@ktangsali ktangsali Feb 23, 2026

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cc. @peterdsharpe @coreyjadams for viz.

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@mnabian mnabian Feb 23, 2026

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How about this?

Note: Extras such as gnns, nn-extras, and transformer-engine pull in packages that either ship only source distributions or require wheels built for a specific PyTorch and CUDA version. These should be installed with --no-build-isolation, e.g. uv sync --extra cu13 --extra gnns --no-build-isolation.

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@ktangsali ktangsali Feb 24, 2026

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I like this better, thanks!

CUDA version mismatches the version that was used to compile PyTorch") when
installing extras such as `gnns`, try adding the `--no-build-isolation` flag:
`uv sync --extra cu13 --extra gnns --no-build-isolation`.

### NVCR Container

The recommended PhysicsNeMo Docker image can be pulled from the
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