Author | Lightnews

Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · 8d

Learn how you can use Pixi with #ROS!

We've put together some videos to showcase some Pixi features that are helpful for ROS development.

YouTube Playlist: www.youtube.com/playlist?li...

#ROSCon #ROSCon2025

ROS with Pixi

Video's about how to use Pixi and ROS packages together.

www.youtube.com

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · 7d

What ROS at an Airport Apple Store?!

Pixi makes installation so easy, we can install ROS anywhere now.

#ROSCon2025 #ROSCon #ROS

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · 9d

What!? Multiple #ROS distros on one machine 🤯.
No Docker, No VM, No dual-boot needed!

www.youtube.com/watch?v=oiX...

#ROSCon #ROSCon2025

Multiple ROS Distro's on One Machine!

Pixi allows you to install ROS packages from a RoboStack channel with ease.This video shows you that on a MacBook but the same example works on Linux, Mac an...

www.youtube.com

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · 14d

Get your hands on stickers from @baszalmstra and @rarts_ruby at #ROSCon!

Plus, catch a sneak peek of our latest development work!

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · 20d

In our little deep dive series we're now exploring how cross-compilation in the Conda ecosystem works: prefix.dev/blog/cross-c.... Back in the days, @conda-forge.org rolled this out widely to support osx-arm64 early on, and now for linux-aarch64/ppc64le.

Cross compiling in the Conda ecosystem

Cross compiling is a fundamental capability in modern software development, allowing developers to build packages for different architectures without needing access to the target hardware.

prefix.dev

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Reposted by Wolf Vollprecht

Dave Barry @david-j-barry.bsky.social · 28d

I just tried Pixi from @prefix.dev for the first time.

a man in a suit and tie is screaming with his mouth open and says holy crap are you seeing this ?

ALT: a man in a suit and tie is screaming with his mouth open and says holy crap are you seeing this ?

media.tenor.com

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Reposted by Wolf Vollprecht

jaimergp @rjai.me · Sep 22

I have submitted by first draft PEP! 📦

PEP 804 complements PEP 725 ([external] dependency metadata) with a mapping mechanism to translate ecosystem-agnostic identifiers to your favourite package manager.

More info:

- PEP 725: discuss.python.org/t/103890
- PEP 804: discuss.python.org/t/103891

PEP 804: An external dependency registry and name mapping mechanism

Hello everyone! On behalf of my co-authors @pradyunsg, @rgommers, @mgorny and @msarahan, I’d like to share our work on this new PEP 804 “An external dependency registry and name mapping mechanism”. ...

discuss.python.org

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Sep 18

Our server has recently delivered more than 1.000.000 packages for the first time. We've hit that mark a few more times since. Seeing this constant growth is fascinating and we are confident that our infrastructure will scale well beyond this number!

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Sep 17

It's always a pleasure to get invoices from Azure. Why? Because it means our @condaforge.org sponsorship is being used! We have been sponsoring a big Windows machine through CirunHQ for the past year to build PyTorch, libmagma, and other hard-to-build software for Windows.

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Sep 11

We're continuing our little deep dive series into Conda packaging. Mutex packages are useful to guide the SAT solver into specific parts of the dependency tree, and globally select either a GPU or CPU variant or similar features for an environment. prefix.dev/blog/what-a...

Mutex packages in the Conda world

Mutex packages are a useful mechanism to guide the solver towards certain dependencies, mutually excluding other dependency trees.

prefix.dev

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Sep 5

Package building with Pixi is being rolled out! Dive into our latest blog post on crafting C++ packages.

And guess what? It’s not just for C++; Pixi plays nice with Python, Rust, ROS, Mojo, and beyond!

prefix.dev/blog/pixi-b...

Build C++ projects with Pixi

Painless dependency management (including shared libraries), monorepos and CI/CD is here for C++/CMake projects with Pixi.

prefix.dev

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Sep 1

Today we're unveiling new Software Supply Chain features for the Conda ecosystem: the integration of Sigstore is in public beta on prefix! You can now create Sigstore attestations on Github Actions and cryptographically secure your supply chain with trusted publishing.

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jul 17

Another deep dive in the technology behind Conda package managers: file linking! Did you know that there are symlinks, hardlinks and reflinks? Reflinks are the best – copy on write is space efficient and isolates the cache.

Learn more: prefix.dev/blog/what-l...

What linking means when installing a Conda package

Package managers face a fundamental challenge: how to efficiently place files from a package cache into multiple environments without excessive disk usage or compromising isolation.

prefix.dev

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jul 4

The documentation of @conda-forge.org is improving with example recipes for Go and Rust packages – providing useful starting points to get MORE packages into our ecosystem!

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Reposted by Wolf Vollprecht

Kyle Cranmer @kylecranmer.bsky.social · Jul 3

“Raise your hand if you were able to install everything with pixi and run the simulation-based inference tutorial notebook.”
github.com/cranmer/sbi-...

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jun 25

Making it this easy to run complex robot simulations took >4 years. But the investment into Pixi and @RoboStack pays off - now you can start the new @GazeboSim / Turtlesim on macOS with a simple `pixi run start`. 🚀

#ROS #ROS2 #Gazebo @OpenRoboticsOrg

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jun 18

Ever wondered how Conda and Pixi "know" to install CUDA packages only on GPU machines? 🤔

Meet virtual packages - a clever solution to inject system compatibility information to the SAT solver to ensure compatibility.

prefix.dev/blog/virtua...

Virtual Packages in the Conda ecosystem

Virtual packages are a neat trick to inject system requirements into the SAT solver and resolve for compatible packages automatically. In this blog post we talk about how they are used in the Conda ecosystem to support complex cross-platform package distributions.

prefix.dev

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jun 12

Interested in Software Supply Chain Security? We are! That's why we helped to get `cosign` on conda-forge: `cosign` can be used to sign container images or other artifacts with `sigstore`, and you can now easily install it with `pixi global install cosign` 🎉

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jun 11

Thanks to a big internal Pixi refactor to support recursive source dependencies, we have much improved snapshot tests. Now we can observe all the actions Pixi takes to resolve, instantiate and build packages from source:

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jun 11

How do you make compiled software with hardcoded paths work anywhere?

255-character placeholders, $ORIGIN rpaths, and platform-specific binary patching.

We explain how Conda packages achieve relocatability:
prefix.dev/blog/what-i...

What is a Conda package, actually?

At its core, a conda package really is just a "glorified" tarball—a compressed archive of files with some metadata attached.

prefix.dev

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jun 10

You might have already heard that Pixi is written in Rust, but did you know that Pixi is also useful when creating Rust programs? Watch Julian's talk "Pixi: the missing companion to cargo" to find out more: www.youtube.com/watch?v=Hso...

Julian Hofer - Pixi: the missing companion to cargo

Recording of a talk given at the Scientific Computing in Rust 2025 online workshop.With cargo, package management becomes easy until you depend on Fortran, C...

www.youtube.com

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Wolf Vollprecht @wolfvollprecht.bsky.social · Jun 7

You should have told me when we had beers yesterday!

Quansight @quansight.com · Jun 6

Celebrating 4 incredible years with ‪@rjai.me‬! 🌟 As a conda steering committee member and conda-forge core team member, Jaime helps coordinate efforts that enable scientific breakthroughs. Here's to more years of community-driven innovation! 🙌 #CommunityImpact #OpenSource

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jun 6

It all "just worked" from 1 command ... yes, that is the point!

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Wolf Vollprecht @wolfvollprecht.bsky.social · Jun 6

Learning something new everyday by building cross-platform tools. The @condaforge m2-git behaved a bit weird when asking for `ref^{commit}` to get the latest commit. It's because MSYS does some glob-expansion and strips `{` and `}` when not using `set MSYS=noglob`...

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Reposted by Wolf Vollprecht

prefix.dev @prefix.dev · Jun 5

These days you can easily use S3 buckets to host your Conda packages. @quantcotech folks have implemented support across pixi, rattler and rattler-build.

We're excited because we want Conda packages to be used everywhere without vendor lock-in!

prefix.dev/blog/s3-sup...

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.

prefix.dev

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