{
  description = "A comic strip downloader and archiver (unstable)";

  inputs = {
    nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.0.tar.gz";
    flake-utils.url =
      "https://flakehub.com/f/numtide/flake-utils/0.1.85.tar.gz";
  };

  outputs = { self, nixpkgs, flake-utils, ... }:
    let pythonVersion = "python39";
    in flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        lib = pkgs.lib;
        python3Packages = pkgs.python3Packages;
        fetchPypi = pkgs.fetchPypi;
      in rec {
        defaultPackage = python3Packages.buildPythonApplication rec {
          pname = "dosage";
          version = "3.1.dev104+g9e05fae304";
          format = "pyproject";

          src = pkgs.fetchFromGitHub {
            owner = "webcomics";
            repo = "dosage";
            rev = "9163317abadcef0a562afaaf422828b56d006e20";
            hash = "sha256-t5HxvXCFPNG5K1uDtfIxDo6JV921ywY1Eznj7GoSh44=";
          };

          nativeCheckInputs = with python3Packages; [
            pytestCheckHook
            pytest-xdist
            responses
          ];

          nativeBuildInputs = with python3Packages; [ setuptools-scm ];

          propagatedBuildInputs = with python3Packages; [
            colorama
            imagesize
            lxml
            platformdirs
            requests
          ];

          meta = {
            description = "A comic strip downloader and archiver";
            homepage = "https://dosage.rocks/";
            license = lib.licenses.mit;
            maintainers = with lib.maintainers; [ dmoonfire ];
          };
        };

        formatter = pkgs.alejandra;
      });
}