{
  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

  outputs =
    inputs @ { nixpkgs
    , systems
    , ...
    }:
    let
      inherit (nixpkgs) lib;
      eachSystem = lib.genAttrs (import systems);
      pkgsFor = eachSystem (system:
        import nixpkgs {
          localSystem = system;
        });
    in
    {
      devShells =
        eachSystem
          (system: {
            default =
              let
                pkgs = pkgsFor.${system};
                pico-sdk = pkgs.pico-sdk.override {
                  withSubmodules = true;
                };
                PICO_SDK_PATH = "${pico-sdk}/lib/pico-sdk";
              in
              pkgs.mkShell {
                name = "PicoVGA dev shell";
                inputsFrom = [ pico-sdk ];
                packages = with pkgs;
                  [
                    gcc-arm-embedded
                    python3

                    usbutils
                    picotool
                  ]
                  ++ [ pico-sdk ];

                shellHook = ''
                  ln -sf ${PICO_SDK_PATH}/external/pico_sdk_import.cmake pico_sdk_import.cmake
                '';

                inherit PICO_SDK_PATH;
              };
          });
    };
}