{
  outputs =
    {
      self,
      flake-utils,
      nixpkgs,
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
      in
      rec {
        devShells.default = pkgs.mkShell {
          inputsFrom = [
            packages.fpga
            packages.usbkbd
          ];
          nativeBuildInputs = [
            pkgs.gtkwave
            pkgs.picocom
            pkgs.usbutils
            packages.wchisp
          ];
          env = {
            BSC = pkgs.bluespec;
            BSC_SRC = pkgs.bluespec.src;
          };
        };

        packages = {
          fpga = pkgs.callPackage ./fpga { };
          usbkbd = pkgs.callPackage ./usbkbd { };

          wchisp = pkgs.callPackage ./nix/wchisp.nix { };
        };
      }
    )
    // {
      nixosModules.default = import ./nix/module.nix;
    };
}