python3.pkgs.sip_4: use pythonImportsCheck

  enableParallelBuilding = true;

  installCheckPhase = let

    modules = [

      sip-module

      "sipconfig"

    ];

    imports = lib.concatMapStrings (module: "import ${module};") modules;

  in ''

    echo "Checking whether modules can be imported..."

    PYTHONPATH=$out/${python.sitePackages}:$PYTHONPATH ${python.interpreter} -c "${imports}"

  '';

  pythonImportsCheck = [ sip-module "sipconfig" ];

  doCheck = true;