{
  description = "Worther - Calculate cryptocurrency taxes & net worth.";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-21.05";

    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils, ... }: with nixpkgs.lib;
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        worther = callPackage ./worther.nix { pkgs = nixpkgs; };

      in rec {
        packages = flake-utils.lib.flattenTree {
          worther = nixpkgs.legacyPackages.x86_64-linux.worther;
        };
        defaultPackage = packages.worther;
      });
}