{ description = "xchg rax, rax"; outputs = { self, nixpkgs, ... }: let supportedSystems = [ "x86_64-linux" ]; forAllSystems = nixpkgs.lib.genAttrs supportedSystems; in { devShells = forAllSystems (system: let pkgs = nixpkgs.legacyPackages.${system}; in { default = pkgs.mkShell { buildInputs = with pkgs; [ gdb gnumake nasm ]; }; }); }; }