**Error**: `Failed to execute uv --version. Ensure uv is installed and in PATH.`
**Fix**: Install native ecosystem prerequisite tools (`uv`, `cargo`, `pnpm`).
**Error**: `Lockfile hash mismatch for python: expected sha256:..., got sha256:...`
**Fix**: Re-run `rivox build` to synchronize `rivox.lock` with updated native lockfiles.
See also: [faq.md](faq.md), [cli.md](cli.md).