{
  description = "ECP5 toolchain template project";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
	flake-parts = {
		url = "github:hercules-ci/flake-parts";
		inputs.nixpkgs-lib.follows = "nixpkgs";
	};
  };

  outputs = inputs@{flake-parts, ... }:
	flake-parts.lib.mkFlake { inherit inputs; } {
		# flake = let
		# in {
		# };
		# devShells."x86_64-linux".default = pkgs.mkShell {
		#         packages = with pkgs; [
		#           (python3.withPackages (pypkgs: with pypkgs; [ 
		#             amaranth
		# 	  amaranth-boards
		#           ]))
		#           yosys
		#           nextpnr
		#           # simulators
		#           iverilog
		#           verilator
		#           # support package
		#           trellis
		#           # loader
		#           openfpgaloader
		#           ecpdap # easier to poke probes.
		#         ];
		#       };
		# };

		systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];

		perSystem = {config, self', inputs', pkgs, system, ...}: {
			packages.default = pkgs.python3.pkgs.buildPythonPackage {
				name = "groovylight";
				version = "0.0.1";
				src = ./.;
				format = "pyproject";

				build-system = [pkgs.python3.pkgs.pdm-backend];

				propagatedBuildInputs = [
					pkgs.python3.pkgs.amaranth
					pkgs.python3.pkgs.amaranth-boards
				];

				doCheck = true;
				nativeCheckInputs = with pkgs; [
					python3.pkgs.pytestCheckHook
					yosys
					nextpnr
					trellis
					openfpgaloader
				];
			
			};
			devShells.default = pkgs.mkShell {
		        packages = with pkgs; [
		          (python3.withPackages (pypkgs: with pypkgs; [ 
		            amaranth
			  		amaranth-boards
		          ]))
				  self'.packages.default
		          yosys
		          nextpnr
		          # simulators
		          iverilog
		          verilator
		          # support package
		          trellis
		          # loader
		          openfpgaloader
		          ecpdap # easier to poke probes.
		        ];
			};
		};
  };
}