We use Nix at Project IDX to manage development environments. Nix is an open source environment manager that is fast, scalable, and deterministic. With Nix, there's no more "it works on my machine" problems. Nix may not be a tool you've heard of before, but it's been invaluable for us. In this interview I go into details about how we Nix to power IDX development environments, ensuring that everyone on the team is using the same tools and versions.