{
  description = "b12f invoiceplane template";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11";
    flake-parts.url = "github:hercules-ci/flake-parts";
  };

  outputs = inputs@{ self, ... }:
    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
      imports = [
        inputs.flake-parts.flakeModules.easyOverlay
      ];

      perSystem = args@{ system, pkgs, lib, config, ... }: let
        invoiceplane-template = pkgs.stdenv.mkDerivation {
          name = "invoiceplane-template";
          src = ./.;
          installPhase = '' 
            mkdir -p $out
            cp *.php $out/
          '';
        };
      in {
        packages.default = invoiceplane-template;
        packages.invoiceplane-template = invoiceplane-template;
        overlayAttrs = {
          inherit (config.packages) invoiceplane-template;
        };
      };
    };
}