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

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.