{ description = "A basic flake with a shell"; inputs = { nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; flake-utils.url = "github:numtide/flake-utils"; }; outputs = { nixpkgs, flake-utils, ... }: flake-utils.lib.eachDefaultSystem (system: let pkgs = import nixpkgs { inherit system; }; in { devShells.default = pkgs.mkShell { buildInputs = with pkgs; [ go pigeon nodejs sqlite ]; shellHook = '' echo "System: ${system}" ''; }; } ); }