{ inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; outputs = { self, nixpkgs, }: let supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"]; forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f { pkgs = import nixpkgs {inherit system;}; }); in { devShells = forEachSupportedSystem ({pkgs}: { default = pkgs.mkShell { buildInputs = with pkgs; [ cargo rustc rustfmt rustPackages.clippy rust-analyzer curl ]; }; }); }; }