{
  description = "Pure Nix library for IPv4 operations";

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

  outputs =
    { self, nixpkgs-lib }:
    let
      # Import our library with nixpkgs.lib
      ipLib = import ./lib { lib = nixpkgs-lib.lib; };

      # Systems for checks and packages
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];
      forAllSystems = f: nixpkgs-lib.lib.genAttrs systems f;

    in
    {
      # Primary library output
      lib = ipLib;

      overlays = {
        default = final: prev: {
          lib = prev.lib.extend self.overlays.lib;
        };

        lib = final: prev: {
          iputils = ipLib;
        };
      };

      # Tests
      checks = forAllSystems (
        system:
        let
          lib = nixpkgs-lib.lib;
          runTests = import ./tests {
            inherit lib system;
            ipLib = ipLib;
          };
        in
        {
          tests = runTests;
        }
      );
    };
}