Flox

Release v1.6.1 · flox/flox Notable features and fixes This release addresses several bugs and adds new improvements, including: A bug was fixed in flox activate where profile scripts were previously run more than once for l...

We have just released Flox 1.6.1. This release fixes a key bug in layered activation, reduces CPU usage in the flox-watchdog daemon, and improves error handling and help output in several spots.

See buff.ly/oc22Gpn for download links and full release notes.

We’re hiring! 🚀

We’re looking for a Full-Stack Engineer to help build and maintain the core services and user interfaces that power our SaaS offering.

You’ll work closely with product, design, and engineering to help move our product forward.

Join us: buff.ly/LVibE69

Great news! 🎉

Our CEO Ron Efroni has joined the Advisory Board for State of Open Con 2026 by OpenUK, one of the world’s top open source conferences.

He’s joining an amazing group of community leaders, engineers, and open source advocates to help shape next year’s event.

buff.ly/BVieGEO

One environment. Everywhere.

FloxHub is a cloud service that enables you to share your Flox environments.

It is your single source of truth for reproducible dev environments and a central place to share, update, and manage them across your team.

Full guide: buff.ly/lKa76iJ

We’re pleased to inform you….

Happy Friday!

Flox is now part of HackerRank July ’25 Release!

We’re thrilled to help power a new era of developer hiring, where candidates step into real, ready-to-code reproducible environments, and teams run interviews in setups that reflect how software is built.

buff.ly/2ok5xEk

We’re so excited to welcome Morgan Helton to the Flox team! 🎉

Morgan brings a deep passion for open-source software and a track record of making systems more reliable, scalable, and efficient.

Welcome aboard, Morgan! Get ready for some karaoke soon! 🎤

Ship software that behaves the same everywhere!

Here’s what’s new with the Flox Build & Publish features:

✅ Cross-platform builds
✅ Embedded dependencies
✅ Sandboxed builds
✅Built-in bookkeeping

Full guide: buff.ly/ynQreXa

Containers help you ship software.

#Nix helps you build software: with reproducibility, determinism, and control.

Used together, they solve some of the biggest gaps in modern CI/CD:

- build drift
- dependency sprawl
- non-deterministic deployments

Full guide: buff.ly/gwYLSiQ

In this video @z-mitchell.bsky.social shows how to:

— Search for exact Python versions
— Install multiple versions side by side… without creating virtual environments
— Test and compare releases: verify that Python 3.14 doesn’t break what works in Python 3.13

Full video: buff.ly/7c55LH5

Need a smoother setup for your dev environment?

We put together some quick-start guides to help you handle secrets, containers, observability, and more (all using Flox.)

Start here: buff.ly/QDJwI7D

Last week’s ACTIVATE Meetup at Ramp HQ was such a good time 🙌

Thanks to everyone who came by!

Big shoutout to our speakers from Ramp, @awscloud.bsky.social, Profound, @superblocks.com, Vercel, and Flox.

And thanks to Ramp for hosting us in their beautiful space! 😍

See you at the next one!

This pretty much nails what we’re trying to do at Flox:

✅ Bring the power of Nix to more developers
✅ Cut the learning curve
✅ Help teams build reproducible environments, faster

Bonus points if we can respond to a GitHub Actions issue in under 5 minutes 😎

(We try!)

Big thanks!

Release Flox v1.6.0 · flox/flox Features This release introduces Nix expression builds, which allow Flox users to define builds using the Nix declarative language. These builds can take full advantage of the flexibility and robus...

We have just released Flox 1.6.0. This release introduces Nix expression builds, which take full advantage of the flexibility and robustness provided by Nix helpers like mkDerivation, along with additional fixes related to Flox Build.

See buff.ly/yu4JcLG for download links and full release notes.

We believe #Nix is the future of secure, reproducible software and we’re excited to sponsor Nix Vegas at DEF CON 33 this August!

Where: Las Vegas
When: August 7–10, 2025

Save your spot: nix.vegas

Hey, San Francisco!

We’re co-hosting a Hack Night at @github.com HQ on August 11 with our friends at Weaviate and ACI.dev and you’re invited!

Join us: buff.ly/IgQqdn8

Dev environments that just work (everywhere.)

✅ Push once, run anywhere
✅ See changes over time
✅ Works across macOS, Linux, and WSL

Read more: buff.ly/JgKuIzr

Friday news!

@telliott.me took Flox for a spin and shared his thoughts in The Friday Deploy 🎉

“I’m sure I’ll be using it for some more serious projects soon.”

We love seeing Flox in the wild 💜

Full writeup 👉 buff.ly/KL75tNF

Experimenting with Flox's new build and publish Trading perfect reproducibility for usability: a pragmatic look at Flox's new features

Just published: "Experimenting with Flox's new build and publish"

After seeing Flox's announcement of their new build and publish features, I spent some time exploring!

open.substack.com/pub/thefrida...

#DevTools #BuildSystems

We’re hiring a UX Designer & Researcher 🎨💻

Flox is building the next generation of developer tools and we need a systems thinker who loves intuitive design.

Learn more about the role 👉 buff.ly/J9Q20gq

What is Flox?

In this quick video, Ross shows what that looks like:

- Installing tools
- Spinning up a dev environment
- Keeping everything portable, reproducible, and easy to share

Watch it here: buff.ly/ZdK2c1F

Flox | Introducing Flox Build and Publish With Flox Build and Publish, your local dev environment is the same as your CI environment, which are the same as your build and runtime environments. You use the same environment across the entirety…

Build and Publish is new way to build, package, and ship software with full reproducibility, across every phase of the SDLC. 🚀

Check out the full writeup with code examples 👇

NYC tomorrow!

We’re hosting an ACTIVATE Meetup at Ramp HQ tomorrow night and there’s still time to grab a spot.

You’ll hear from folks at Ramp, AWS, Profound, Superblocks, Vercel, and Flox

See you there?

Save your spot: buff.ly/TnNRV51

🎉 Flox is a Diamond Sponsor of NixCon 2025!

We’re excited to support the Nix community at this year’s event in Switzerland <3

NixCon is where engineers, maintainers, and contributors come together to share ideas, tools, and what’s next for Nix.

Can’t wait to see you there!

Building and publishing your own software packages just got a whole lot easier.

In this video, our VP of Engineering @stahnma.bsky.social walks through how to go from “works on my machine” to reproducible builds you can publish, install, and share across your team (all with Flox)

buff.ly/vuUqBZH

ACTIVATE: Meetup @ Ramp HQ · Luma Join us for a fun ACTIVATE meetup at the amazing Ramp HQ! It's all about modern dev workflows, scalable infra, and how AI is changing the way we build…

NYC friends! 🗽

Join us Tuesday at Ramp HQ for an ACTIVATE meetup on modern dev workflows, infra, and AI in engineering.

Demos from: Ramp, AWS, Profound, @superblocks.com, @vercel.com, and Flox

Snacks, drinks, and great convos

🕕 Start at 6PM
📍 Ramp HQ, NYC

RSVP: buff.ly/J9rEESs

Release v1.5.1 · flox/flox Notable features and fixes This release addresses several bugs and adds new improvements, including: Fixed bug triggered by symbolic links in manifest build outputs referring to $FLOX_ENV Updated ...

We have just released Flox 1.5.1. This release includes improvements to build and publish, along with several other fixes and refinements.

See buff.ly/oPbfJPp for download links and full release notes.

We recently launched something big at Flox: Build & Publish 🎉

✅ Build in a clean, reproducible environment
📦 Package it with everything it needs
🚀 Run it anywhere

Ready to dive in?

Full walkthrough: buff.ly/ARJ3TSH

15-min demo (Go project): buff.ly/kBYDWUi

Quick docs tutorial: buff.ly/KrFf1yr

Flox | Reclaiming the SDLC CI/CD is just a wrapper. To align and scale software delivery across the SDLC, teams need environments that are reproducible, auditable, and portable by default.

flox.dev/blog/reclaim...

In this piece, our CTO Michael Brantley breaks down:

- Why even good teams still struggle with drift, broken builds, and misalignment, even with CI/CD
- What makes Nix so powerful under the hood
- What it takes to make reproducibility practical in everyday engineering