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docs(build): enable pre-releases when installing from source #13479

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9 changes: 8 additions & 1 deletion docs/fern/pages/developer-guide/advanced-customizations/building-from-source.md
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Expand Up @@ -78,9 +78,16 @@ Install Dynamo with a backend extra to pull the inference engine and its CUDA de

```bash
# Use .[vllm] or .[sglang] instead to install the relevant framework dependencies
uv pip install -e .
uv pip install -e . --prerelease=allow
```

`--prerelease=allow` is required on Python < 3.13. The base dependency
`aisimulate==0.1.0.dev1` is a pre-release, and it in turn pins the pre-releases
`aiconfigurator==0.11.0.dev20260728` and `tfp-nightly==0.26.0.dev20260626`.
`uv` refuses those transitive pre-releases even though the direct pin is
explicit, so without the flag the install fails with `we can conclude that your
requirements are unsatisfiable`.

> [!NOTE]
> The base `uv pip install -e .` installs only the Dynamo runtime and frontend. A backend extra (`[vllm]`, or `[sglang]`) will install the relevant framework dependencies to run an inference worker. For the TensorRT-LLM backend, use the `tensorrtllm-runtime` container instead of installing via `uv pip` to ensure the right dependencies are installed. See [Local Installation](../../cli/installation/install-dynamo.mdx) for more details.

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