{ description = "Basic Rust project"; inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable"; outputs = { self, nixpkgs }: let forAllSystems = nixpkgs.lib.genAttrs [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ]; in { devShells = forAllSystems ( system: let pkgs = import nixpkgs { inherit system; }; in { default = pkgs.mkShell { buildInputs = with pkgs; [ gcc rustc cargo cargo-watch rustfmt pkg-config openssl ]; }; } ); }; }