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

  outputs = { nixpkgs, ... }:
    let
      forAllSystems = nixpkgs.lib.genAttrs [ "aarch64-darwin" "x86_64-linux" ];
    in
    {
      devShells = forAllSystems (system: {
        default = nixpkgs.legacyPackages.${system}.mkShell {
          packages = [ nixpkgs.legacyPackages.${system}.ergogen ];
        };
      });
    };
}