{  inputs = {    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";    flake-utils.url = "github:numtide/flake-utils";  };  outputs = {    nixpkgs,    flake-utils,    ...  }:    flake-utils.lib.eachDefaultSystem (      system: let        pkgs = nixpkgs.legacyPackages.${system};      in {        devShells.default = pkgs.mkShell {          buildInputs = with pkgs; [            # generic            git            git-lfs            gnumake            gnused            gnutar            gzip             # frontend            nodejs_20             # linting            python312            poetry             # backend            gofumpt            sqlite            go            gopls          ];        };      }    );}