The prefix.dev blog
Where we talk about software package and environment management.
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S3 support in Pixi and rattler-build
We're excited to announce S3 support across our entire toolchain – rattler, pixi, and rattler-build now support the most common cloud storage standard, thanks to contributions from our friends at QuantCo. This vendor-agnostic approach to distributing Conda packages represents a major step forward for the ecosystem, offering teams the flexibility to host packages on any S3-compatible provider (AWS, Cloudflare R2, Backblaze B2, Hetzner, and more) with built-in authentication and minimal vendor lock-in.
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Less Boilerplate, More Logic: Parameterising Pixi Tasks
Introducing powerful extensions to the existing task system
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Enhancing the Conda Ecosystem in 2025
We are working on some exciting Conda Enhancement Proposals (CEP) in 2025. Read more about them here.
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Trusted publishing to conda channels
Never forget your API keys again—with trusted publishing to prefix's channels
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Pixi Global: Declarative Tool Installation
Think Homebrew, but cross-platform and easy to share with collaborators
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Building CPU optimized packages for conda-forge
Did you know your packages could be even faster by enabling optimized CPU instructions? Learn how to build optimized packages for conda-forge.
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rattler-build in conda-forge
rattler-build — the revolutionary build tool for the conda ecosystem (almost) available in conda-forge
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Towards a Vendor-Lock-In-Free conda Experience
Why conda-forge is expected to remain free and open-source in the foreseeable future
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WASM + Conda: Revolutionizing Scientific Computing in the Browser
Did you know that Conda packages can be built for WASM? Read more on how to build and use them with pixi!
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Pixi - reproducible, scientific software workflows!
As scientists, your focus should be on research, not wrestling with software environments. At this year's SciPy conference, we're excited to show Pixi.
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50x faster solves with sharded repodata
Repodata fetching can be painfully slow. We propose an alternative method that can speed things up drastically.
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The joy of building conda packages with rattler-build
Learn how to integrate rattler-build into the conda-forge ecosystem, covering the essentials of conda-build and rattler-build, and how to create modern conda packages.
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Using Python Projects With Pixi
pixi 0.18.0 ships with git, path and editable PyPI dependencies, improved PyPI <-> Conda mapping and experimental pyproject.toml support.
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Introducing Pixi's Multiple Environments
Unleash the power of multiple environments — for the real power user.
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7 Reasons to Switch from Conda to Pixi
Pixi is conda-compatible and comes with: more speed, lockfiles and tasks. It is the next-gen pacage manager for Python, R and more!
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Adopting uv in pixi
tl;dr we're integrating uv into pixi
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Building a C++ package with rattler-build
Conda packages are not only for Python! Learn how to build a C++ pacakge with conda-froge and rattler-build
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rattler-build: A new parser
We have rewritten the rattler-build recipe parser with great developer experience in mind.
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Prefix.dev — End of 2023
Follow what we have created this year, and plan for the next year.
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Unleashing PyPI support in pixi
We've deeply integrated PyPI packages into pixi.toml's — read more...
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Introducing Py-Rattler
Py-Rattler the Python partner to the blazingly fast rattler library.
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Introducing rip — the fast & barebones pip implementation
`rip` resolves and installs packages from PyPI from pure Rust
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Let Roboticists Stress About Boxes not Packages
Learn why `pixi` and the conda ecosystem are perfect of robotics.
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Let's stop dependency hell
Pixi is a new package manager for the conda ecosystem, written in Rust. It's fast multi-platform, and language-agnostic.
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The new Rattler Resolver
We wrote a new, fast SAT solver for conda packages in Rust – a port of the libsolv C library.
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Why we support PackagingCon
prefix.dev is going to be at PackagingCon 2023, the software packaging conference
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How we implemented API keys for prefix!
It's easy to overlook how important security is when implementing API keys
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Introducing Channels: Host Your Own Packages
You can now host your own packages on prefix.dev
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The new rattler-build
We are releasing a Rust based conda-build replacement that builds cross-platform binary packages much faster.
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Repodata patching: how conda-forge keeps compatible
Keeping packages in a large repository compatible over time is tricky. conda-forge has a highly useful mechanism for that: repodata-patching.
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Introducing Rattler: Conda from Rust
At prefix.dev we love Rust, but using conda/mamba from Rust is hard, so we started building Rattler, a set of crates that offer clean, compartmentalized building blocks for package management.
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Introducing Online Environment Solving
We've released our first version of online environment solving.
To upper bound or not – the Python packaging debates
A hot debate is happening in the Python packaging world – should you use upper bounds to constrain your dependencies or not? We think there must be a better way.
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Mamba 1.2 Release
We've released mamba 1.2 and here are all the improvements
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Launching prefix.dev
We are excited to tell you more about what we are up to!
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We're hiring
We are hiring engineers to work on developer tools (C++, Rust), our platform (Rust, TypeScript, React) and conda-forge (Python, CI pipelines)...