{
  description = "Command line utility for generating ASN labels for paperless with both a human-readable representation, as well as a QR code for machine consumption.";

  inputs = {
    pyproject-nix = {
      url = "github:nix-community/pyproject.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { nixpkgs, pyproject-nix, ... }:
  let
    project = pyproject-nix.lib.project.loadPyproject {
      projectRoot = ./.;
    };

    pkgs = nixpkgs.legacyPackages.x86_64-linux;
    python = pkgs.python3;
  in
  {
    devShells.x86_64-linux.default =
      let
        arg = project.renderers.withPackages { inherit python; };
        pythonEnv = python.withPackages arg;
      in
      pkgs.mkShell { packages = [ pythonEnv ]; };
    packages.x86_64-linux.default =
      let
        attrs = project.renderers.buildPythonPackage { inherit python; };
      in
      python.pkgs.buildPythonPackage attrs;
  };
}