---
title: "uv"
category: "Languages and runtimes"
tagline: "A fast Python package and project manager that can stand in for pip, venv and pipx."
source: "pacman"
package: "uv"
command: "uv"
website: "https://docs.astral.sh/uv/"
code: "https://github.com/astral-sh/uv"
---

## What it is

uv is a Python package installer and project manager written in Rust by Astral. It does the jobs of pip, virtualenv, pipx and pip-tools with one command, much faster: it creates environments, resolves and locks dependencies, installs Python versions and runs tools.

## Why it's here

- **Fast.** Installs and dependency resolution take a fraction of the time pip needs.
- **Projects made simple.** `uv init`, `uv add` and `uv run` manage a project's environment and lock file for you.
- **Run tools without installing them.** `uvx ruff check` runs a tool in a throwaway environment.

## On CoreDesktop

uv is installed from pacman. CoreDesktop also needs it for upgrades: pipx apps installed with pipx's uv backend, as Hermes Agent installs them, need uv to upgrade. `update` keeps uv current with the rest of the pacman packages.

```
uv run script.py
```