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# One Environment, N Machines: Deterministic Builds for Humans and Agents


- **Event:** World Congress 2026 North America

## Description

Software used to be built in a handful of places you controlled. Now it's built everywhere: a laptop, a fleet of CI runners, a local sandbox, a remote sandbox with an agent driving it. Increasingly, nobody sets those machines up by hand. Two hard problems fall out of this: making the build produce the same result on every machine, and making the output of that build reproducible wherever it runs next. This talk looks at how deterministic, declarative environments (built on Nix) solve both: one definition that pins packages, toolchains, and even agent skills, reproduced bit-for-bit across the lifecycle, with a verifiable record of everything that went in. We'll show how Flox makes this practical without requiring your team to learn Nix.

## Speakers

### [James Bayer](https://www.wearedevelopers.com/@james-bayer)

Product Leader, Flox
### [Morgan Helton](https://www.wearedevelopers.com/@morgan-helton)

Software Engineer @ Flox


## Related talks at this congress

- [rm -rf: Horror Stories From Unsandboxed AI Agents (and How Docker Fixes This)](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1718-rm-rf-horror-stories) — Rishab Kumar
- [SBX 101: Hands-on with Docker Sandboxes](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1818-sbx-101-hands-on) — Dan Ndombe
- [Agentic Drift: keeping pace with your agents](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1739-agentic-drift) — John Coghlan
- [Give the Agent a Budget, Not a Token](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1695-give-the-agent-a) — Sachin Malhotra

## Watch remotely

Can’t make it to San José? Watch this session live with Pro. You also get:

- All full videos, bookmarks, and playlists
- World Congress livestreams

[See pricing](https://www.wearedevelopers.com/pricing)

## Links

- [Get tickets](https://www.wearedevelopers.com/world-congress-north-america/tickets)