# Troubleshooting & Common Error Resolutions
### 1. Missing Native Prerequisite Tool
**Error**: `Failed to execute uv --version. Ensure uv is installed and in PATH.`
**Resolution**: Install the native ecosystem CLI tool required by your manifest (`uv`, `cargo`, or `pnpm`).
### 2. Lockfile Hash Mismatch
**Error**: `Lockfile hash mismatch for python: expected sha256:..., got sha256:...`
**Resolution**: Run `rivox build` to synchronize `rivox.lock` with your updated native lockfiles.