pixi — Package management for reproducible environments

pixi — Package management for reproducible environments

Pixi is a fast, cross-platform, next-generation package manager that provides reproducible environments.

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When to use Pixi

• To create and manage reproducible development environments.
• To handle both Python and non-Python dependencies (e.g., system libraries) in the same environment.
• To manage cross-platform builds and cross-compilation.
• To migrate from uv or other package managers.
• When working with PyTorch, Rust, C++, or R.

Key Concepts

• Workspaces: Pixi allows managing multiple projects with shared dependencies using workspaces.
• Global Tools: Install isolated CLI tools globally using pixi global install.
• Reproducibility: Pixi uses lockfiles (pixi.lock) to ensure exact versions of packages across platforms.
• Backends: Pixi integrates with various build backends (e.g., pixi-build-cmake, pixi-build-python).

References

For detailed usage, consult the references:

• Installation
• First Workspace
• Python Tutorial
• Python - pyproject.toml
• Python - PyTorch
• Rust Tutorial
• Global Tools Introduction
• Build - Getting Started
• Build - Python
• Build - C++
• Build - Workspace
• Build - Advanced C++
• Build - Cross Compilation
• Build - Backends
• Build - pixi-build-cmake
• Build - pixi-build-python
• Build - pixi-build-rattler-build
• Build - pixi-build-r
• Build - pixi-build-rust
• Key Concepts - Compilers
• Deployment - Prefix
• Deployment - Pixi Pack
• Security
• Switching from uv

Examples

Initialize a project

pixi init

Add dependencies

pixi add python
pixi add numpy pandas

Run a command inside the environment

pixi run python script.py