{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs =
    { self, nixpkgs }:
    let
      system = "x86_64-linux"; # Adjust if necessary
      pkgs = import nixpkgs {
        inherit system;
      };

    in
    {
      packages.${system} = {
        xsdata-pydantic = pkgs.python313Packages.callPackage ./xsdata-pydantic.nix { };
        entsoe-apy = pkgs.python313Packages.callPackage ./entsoe-apy.nix {
          xsdata-pydantic = self.packages.${system}.xsdata-pydantic;
        };
      };

      devShells.${system} = {
        default = pkgs.mkShell {
          name = "packaging";
          venvDir = "./.venv";
          buildInputs = [ pkgs.python313Packages.pip ] ++ builtins.attrValues self.packages.${system};
        };
      };
    };
}