system: nixpkgs:  # e.g. x86_64-linux

let
  disablePyChecks = pkg: pkg.overridePythonAttrs (old: {
    doCheck = false;
    doInstallCheck = false;
    dontCheck = true;
  });
in {
  system = system;
  pkgs = import nixpkgs {
    inherit system;
    overlays = [(final: prev: {
      pythonPackagesExtensions = prev.pythonPackagesExtensions ++ [(pyfinal: pyprev: {
        dnspython = (disablePyChecks pyprev.dnspython).overridePythonAttrs (old: {
          disabledTests = [
            # This test is unreliable when my internet is throttled by Indonesian ISP, timeout everywhere... lovely...
            "test_resolver"
          ] ++ old.disabledTests;
        });
        pillow = disablePyChecks pyprev.pillow;
        cherrypy = disablePyChecks pyprev.cherrypy;
      })];
    })];
    config.allowUnfree = true;
  };
}