# SOCI v2 support for Depot container builds (https://depot.dev/changelog/2026-06-19-soci-support)

> Published 2026-06-19

Depot container builds now support [SOCI](https://github.com/awslabs/soci-snapshotter) (Seekable OCI) v2. With a compatible runtime, containers start after downloading only the files they need instead of pulling the entire image first, cutting startup time for large images like CUDA or PyTorch.

Depot generates the SOCI v2 index at build time, so there's no separate post-push indexing pipeline. SOCI is opt-in via the `--output` flag:

```bash
depot build -t repo/image:tag --push \
  --output type=image,soci=true,compression=gzip,force-compression=true,oci-mediatypes=true \
  .
```

See the [announcement post](/blog/now-available-soci-support-for-container-builds) for the full details.

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