Always great to see users that are having success with rattler / rattler-build, and cleaning up the misconceptions around Conda Community packaging:

You can now publish "Channel Notices" on prefix - tell your users what's new in your channel! These will be shown in the channel overview, and in Conda, Pixi and other tools.

The Pixi team is at ROSCON in Toronto - come find the yellow backpacks if you want to chat! We keep spotting Pixi in so many cool robotics projects and it's making us proud. To get a glimpse of what we're working on, join the talk about the EU CRA this afternoon!

If you see one of these people #ROSCON, they are likely from prefix.dev! Come say hi, we're friendly! 💛

@OpenRoboticsOrg

We made it easy to install Isaac ROS! The new `isaac-forge` repository contains many upstream NVIDIA Isaac ROS packages to make them installable with Pixi. You can test it today on your #NIVIDA #Jetson!

No docker needed!

github.com/wolfv/isaac-fo…

Congratulations to the Mojo 1.0 release @Modular! So glad to have you in our community, and seeing @clattner_llvm on stage with `pixi` in the background was definitely a highlight for us.

playground.rattler.build got a redesign and a recipe generator for PyPI, CRAN and CPAN.

Paste a package name, get a recipe.yaml back.

And Android:

rattler-build now builds for iOS and Android.

Conda packages on mobile. Yes, really, we're picking up an old idea from the "conda-mobile" project.

pixi update --offline now resolves against only what you already have: the package cache and local file:// channels.

Air-gapped machines, planes, CI without egress.

Pixi now fully supports archspec, so you can create CPU-optimized environments and let Pixi handle the installation logic.

Read more about it in the blogpost we updated:
prefix.dev/blog/building_…

Use pixi global to install any project from source now.

Pixi global supports the full package spec to configure the neccesary information to install it directly, without a pixi.toml.

Building a git repo that never heard of Pixi used to mean forking it.

Now you declare the build backend inline and Pixi builds it from source.

Conda packages can have extras now.

Optional dependency groups you declare and then consume, via v3 repodata. Plus when conditions and variant flags.

This should also be available on conda-forge in the near future!

📖 : pixi.prefix.dev/latest/concept…

Using an NVIDIA Jetson, BTW

#pytorch #nvidia #jetson

No more gpu and cpu environments, let pixi choose the right platform for you!

[system-requirements] is deprecated. Platforms now carry the requirements themselves.

CUDA and glibc constraints inline, and you can name a target what you actually call it.

PEP 723 only covers Python and PyPI, so Pixi reads tool.pixi for the rest.

Which means conda dependencies in a standalone script.

A single Python file can now carry its own environment.

pixi run --script hello.py

Pixi reads PEP 723 inline metadata.
peps.python.org/pep-0723/

Thanks to @trevmanz

#python #pixi

Beautiful images from a simple `pixi run seahorse` zoomed in to the seahorse valley, running on a @nvidia RTX 4060

More and more multi-output recipes are now building through conda-forge's new rattler-build based staging.

Fast, modern, Rust-powered builds are landing in conda-forge, one recipe at a time.

New community tool: a live dashboard for the conda-forge staged-recipes queue.

See which new packages are waiting for review, what's passing CI, and where things are stuck, all in one place.

As our server grows (600+ channels!) we had to redesign our channel page. It offers you an easier way to find your own or other interesting channels to fetch packages from!

Pixi v0.75.0 now ships with an --offline mode.

Install your environments directly from the shared cache, even on the train or plane! 🛫

Find out more here: pixi.prefix.dev/latest/referen…

GLIM, the real-time 3D LiDAR SLAM framework, is now available on conda-forge.

One-line install with pixi or conda instead of building from source. Good news for the robotics crowd.

See it in action: youtube.com/watch?v=CIfRqe…

The rattler-build playground got a bit fancier! Now also generates recipes for PyPI, CRAN, and CPAN upstream sources.

Try it out under playground.rattler.build

Using @bioconda usually means also configuring @condaforge and a few other channels by hand. Cumbersome, and easy to get wrong.

Our new channel-relations CEP moves that info into repodata, so the solver just knows which channels belong together.

Did you know our dependency resolution library can solve Sudokus? Ben Moss just proved it by adding this example:

github.com/prefix-dev/res…

Want to understand why more and more Scientific Python projects are addopting Pixi? We'll give an overview during our talk at #SciPy2026 !

Ever want to just quickly send some files? sendme by iroh is a very simple clean tool to get it done. No ssh or networking required, just a simple send-receive command.

Quickly install it with Pixi 🚀

Pixi is gaining traction fast in robotics, so we built a dedicated landing page to help roboticists get up and running quickly.

pixi.prefix.dev/latest/robotic…

#ROS #robotics

Pixi now supports relative `exclude-newer` definitions. This allows users to set a cooldown period before using packages from the internet.

This helps avoid pulling in vulnerabilities discovered shortly after release.

We're thrilled to announce our second non-prefix core maintainer of Pixi!
Welcome Lucas Colley! He's been an ESOC 2025 student and since then kept being active, both in the Pixi repo, our Discord community and by adding Pixi to Open-source projects like CPython, SciPy & Numpy!

If you are running a channel that primarily publishes open source packages to a public channel, we are happy to sponsor your community with the open source plan.

We are offering every prefix user access to a personal usage dashboard where you can track channel size and their security settings

Over the past years, our platform has grown from just a few small channels to over 600 Conda channels storing more than 20TB of data.

To help scale it further, today we are launching a fair pricing model based on your usage and needs.

prefix.dev/blog/welcome-c…

Do you want to control your Spot robot dog from a Pixi environment? You can now easily install the spot-cpp-sdk from @condaforge!

github.com/boston-dynamic…

conda-mirror has a config file that let's you select what subset you want to mirror by familiar matchspecs.

Did you know that conda-mirror was rewritten in Rust and uses the rattler libraries?

You can now register Pixi workspaces globally and access them through their name from anywhere in your shell!

From all our conda CLI lovers this was a big request!

Thank you Sophia Castellarin for the implementation!

#pixi #conda #condaforge

Pytorch + Ultralytics + ROS2 Humble on a Nvidia Jetson Nano with no Docker!

Pixi, together with @condaforge and @RoboStack, makes this possible!

#ROS #nvidia #opencv

Are you dreaming of your own specialized *-forge? Our new build tool "rattler-build" makes it simple. Check out our new docs on how to create a custom "r-forge", "rust-forge", "ruby-forge", ... rattler-build.prefix.dev/latest/tips_an…

Thanks to @github and @Microsoft @Azure, @condaforge now natively compiles on macOS Arm64 and Linux Aarch64 machines. Thank you!

Big news: We're rebranding Pixi to VIPER. Turns out ditching the snake theme was a mistake and we're slithering back! New mascot incoming. Thoughts? 🐍

Bioconda now recommends Pixi ahead of conda and mamba as the way to get started. This means a lot to us. We're all-in on making Pixi the best tool for scientific package management.

The main firmware for the Crazyflie Nano Quadcopter has a pixi.toml now.

To quote: "Pixi has a great potential to make our embeded developer lives much easier so I am looking forward at it becoming even better for embedded development! And I would welcome a PR for 'pixi build'"

No more duplicate dependencies in pyproject.toml!

Pixi Python packages can now set `ignore-pypi-mapping = false` to automatically convert `pyproject.toml` dependencies into conda package requirements.

The goal is no configuration, this is a step in that direction!

Pixi GUI now supports an interactive view to inspect the lockfile!

- 🔎 Search in the table
- ©️ Visualize and sort licenses
- 🌲 Tree view for clear dependency relations
- 🌐 Links directly to the browser.

Do you need more control over the packages that will be installed in your Pixi workspaces?

You can now define [constraints], which allow you to specify which versions are allowed when a package is installed.

Don’t like writing recipes? With Pixi packages, it’s a lot less work to package up remote projects!

This is all the configuration needed to build the ruff project into a conda package with Pixi. 🤯

We want to make it easier to build packages!

For that, we have a unified debug experience in `rattler-build` now. You can run `debug setup`, enter a `debug shell`, and even add some dependencies into the host environment with `debug host-add`.

Pixi can now natively build R packages - for your own packages or thirdparty packages from CRAN or Github. The new `pixi-build-r` build backend makes it possible. pixi-build-r will install compilers, system-level dependencies and R / r-packages from @condaforge.

Exciting news!

We're thrilled to welcome Pavel as our first Pixi core maintainer from outside Prefix! With his extensive contributions, we have full confidence in his stewardship of the project. Thank you for your past work, and here’s to an even stronger collaboration ahead!