Pixi Basics

Nebi manages environments built with Pixi, a cross-platform package manager built on the conda ecosystem. This page covers the Pixi commands you’ll use most often when working with Nebi workspaces.

If you’re already comfortable with Pixi, you can skip ahead to the CLI Guides: CLI Local and CLI Team.

Install Pixi

curl -fsSL https://pixi.sh/install.sh | bash

See the Pixi installation docs for more options.

Activate a Shell

Open an interactive shell with the workspace environment activated:

pixi shell

Add Dependencies

Use pixi add to add packages to your workspace. This updates pixi.toml and pixi.lock automatically:

# Add a conda package
pixi add numpy

# Add a specific version
pixi add "python=3.12.*"

# Add a PyPI package
pixi add --pypi flask

# Add a PyPI package with extras and version pin
pixi add --pypi "flask[async]==3.1.0"

Remove Dependencies

pixi remove numpy

This removes the package from pixi.toml and updates pixi.lock.

Install the Environment

After pulling a workspace or editing pixi.toml manually, run:

pixi install

This resolves dependencies and installs all packages defined in the workspace.

List Installed Packages

View all packages installed in the current workspace:

pixi list

Run Commands and Tasks

Run a command or a task defined in pixi.toml inside the workspace environment:

# Run a defined task
pixi run test

# Run an arbitrary command
pixi run python my_script.py

Typical Nebi + Pixi Workflow

Here’s how Pixi commands fit into a typical Nebi workflow:

# 1. Create and track a new workspace
mkdir my-project && cd my-project
nebi init

# 2. Activate the environment
pixi shell

# 3. Add dependencies
pixi add numpy pandas matplotlib

# 4. Push the workspace to your team
nebi push my-project

Learn More

For the full Pixi documentation, visit pixi.sh.