{
  description = "Fudo Coinbase Price Bot.";

  inputs = {
    nixpkgs.url = "nixpkgs/nixos-21.11";
    utils.url = "github:numtide/flake-utils";
    clj-nix = {
      url = "github:jlesquembre/clj-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { self, nixpkgs, utils, clj-nix, ... }:
    utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages."${system}";
        mkCljBin = clj-nix.packages."${system}".mkCljBin;
        update-deps = pkgs.writeShellScriptBin "update-deps.sh" ''
          ${clj-nix.packages."${system}".deps-lock}/bin/deps-lock
        '';
      in {
        packages = rec {
          fudo-pricebot = mkCljBin {
            projectSrc = ./.;
            name = "org.fudo/pricebot";
            main-ns = "pricebot.core";
            jdkRunner = pkgs.jdk17_headless;
            version = "0.1";
          };

          default = fudo-pricebot;
        };

        legacyPackages = {
          fudo-pricebot = self.packages."${system}".fudo-pricebot;
        };

        devShells.default =
          pkgs.mkShell { buildInputs = with pkgs; [ update-deps ]; };
      }) // {
        nixosModules.default = {
          nixpkgs.overlays = [ self.overlays.default ];
          imports = [ (import ./module.nix) ];
        };
        overlays.default = final: prev: {
          fudo-pricebot = self.packages."${prev.system}".fudo-pricebot;
        };
      };
}