I'm using a NixOS server in prod for an application. Works very nicely, makes deployment a breeze. I went from never using NixOS to having a production-ready de

I'm using a NixOS server in prod for an application. Works very nicely, makes deployment a breeze. I went from never using NixOS to having a production-ready deployment, including writing a nixpkg for Nignx configuration and my application, all in about a day. I love how an entire server can be configured with a single Nix file (configuration.nix) along with any custom packages, which are again flat-files. NixOS works best when you're 'all-in' with Nix, including using nixkpkgs over language package managers (or having such package managers be nix-aware). This is not something that's easily done right now, and precludes having a 'pure' Nix experience, especially when using it for dev purposes. In my case though, where the main application is a binary written in OCaml (which uses the opam package manager), NixOS makes it straightforward to build and distribute binary packages that are patched to the correct library paths on the system. Once that was set up, everything else was a breeze. Server maintenance is almost effortless.