ecp5-template/flake.nix

{
  description = "ECP5 toolchain template project";

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

  outputs = inputs@{ nixpkgs, ... }:
    let
      systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];
      forAllSystems = function:
        nixpkgs.lib.genAttrs systems (system: function (
          import nixpkgs {
            inherit system;
            config.allowUnfree = true;
            overlays = []; # patches, version pins here.
          }
        ));

    in {
      devShells = forAllSystems (pkgs: {
        default = pkgs.mkShell {
          packages = with pkgs; [
            python3
            python3Packages.cocotb
            python3Packages.cocotb-bus
            yosys
            nextpnr
            # simulators
            verilog
            verilator
            # support package
            trellis
            # loader
            openfpgaloader
          ];
        };

      });
  };
}