If you haven't used a package manager before, it's basically an app store. It has some similarities to package managers you may have used in the past, such as Homebrew on macOS, APT on Debian-based Linux distributions, Python's pip, or Node.js's NPM. Nix is a tool designed for managing packages and system configurations. Running third-party programs in Replit.Setting up a production-grade web stack, with a database and support for multiple web servers.In this article, we'll cover several different use-cases for Nix on Replit, including: But Nix can do a whole lot more than just enable us to use new languages. As of May 2021, Replit supports all programming languages through the power of Nix.