{
  lib,
  ipLib,
  system,
}:

let
  ipTests = import ./ip-tests.nix {
    inherit lib;
    ip = ipLib.ip;
  };

  cidrTests = import ./cidr-tests.nix {
    inherit lib;
    cidr = ipLib.cidr;
  };

  validateTests = import ./validate-tests.nix {
    inherit lib;
    validate = ipLib.validate;
  };

  iterateTests = import ./iterate-tests.nix {
    inherit lib;
    iterate = ipLib.iterate;
    ip = ipLib.ip;
  };

  allTests = ipTests ++ cidrTests ++ validateTests ++ iterateTests;

in
if allTests == [ ] then
  derivation {
    name = "nix-ip-utils-tests";
    inherit system;
    builder = "/bin/sh";
    args = [
      "-c"
      "echo 'passed!' > $out"
    ];
  }
else
  throw "Tests failed: ${builtins.toJSON allTests}"