Its a Nixos based Linux distribution where the Nix config and Nix flake is written for you and configured using a GUI. It attempts to bring the benefits of Nix to people who don't care to learn the insanity that the Nix language is (I say this as a full-time nixos user)
a Nix Flake is basically just a file to pin packages against a specific version (ie go.mod cargo.lock etc...) you then write a config that defines your system state and packages that you want to be available.
a Nix Flake is basically just a file to pin packages against a specific version (ie go.mod cargo.lock etc...) you then write a config that defines your system state and packages that you want to be available.