anchor.diff:      for i in $out/bin/*; do
         wrapProgram $i --prefix PYTHONPATH : "$PYTHONPATH"
       done
  +
  +    # Let's make it a namespace package
  +    cat << EOF > $out/${python.sitePackages}/PyQt5/__init__.py
  +    from pkgutil import extend_path
  +    __path__ = extend_path(__path__, __name__)
  +    EOF
     '';
  +
  +  installCheckPhase = let
  +    modules = [
  +      "PyQt5"
  +      "PyQt5.QtCore"
  +      "PyQt5.QtQml"
  +      "PyQt5.QtWidgets"
  +      "PyQt5.QtGui"
  +    ]
  +    ++ lib.optional withWebSockets "PyQt5.QtWebSockets"
  +    ++ lib.optional withWebKit "PyQt5.QtWebKit"
  +    ++ lib.optional withConnectivity "PyQt5.QtConnectivity"
  +    ;
  +    imports = lib.concatMapStrings (module: "import ${module};") modules;
  +  in ''
  +    echo "Checking whether modules can be imported..."
  +    ${python.interpreter} -c "${imports}"
  +  '';
  +
  +  doCheck = true;
   
     enableParallelBuilding = true;
   
  
positive.code: { lib, fetchurl, pythonPackages, pkgconfig
  , qmake, lndir, qtbase, qtsvg, qtwebengine, dbus
  , withConnectivity ? false, qtconnectivity
  , withWebKit ? false, qtwebkit
  , withWebSockets ? false, qtwebsockets
  
negative.code: 
    inherit (pythonPackages) buildPythonPackage python isPy3k dbus-python enum34;
  
    sip = (pythonPackages.sip.override { sip-module = "PyQt5.sip"; }).overridePythonAttrs(oldAttrs: {
      # If we install sip in another folder, then we need to create a __init__.py as well
      # if we want to be able to import it with Python 2.
      # Python 3 could rely on it being an implicit namespace package, however,
      # PyQt5 we made an explicit namespace package so sip should be as well.
      postInstall = ''
        cat << EOF > $out/${python.sitePackages}/PyQt5/__init__.py
        from pkgutil import extend_path
        __path__ = extend_path(__path__, __name__)
        EOF
      '';
    });
  
  in buildPythonPackage rec {
    pname = "pyqt";
    version = "5.13.0";
    format = "other";
  
    src = fetchurl {
      url = "https://www.riverbankcomputing.com/static/Downloads/PyQt5/${version}/PyQt5_gpl-${version}.tar.gz";
      sha256 = "1ydgdz28f1v17qqz3skyv26k5l0w63fr4dncc5xm49jr2gjzznqc";
    };
  
    outputs = [ "out" "dev" ];
  
    nativeBuildInputs = [
      pkgconfig
      qmake
      lndir
      sip
      qtbase
      qtsvg
      qtdeclarative
      qtwebchannel
    ]
      ++ lib.optional withConnectivity qtconnectivity
      ++ lib.optional withWebKit qtwebkit
      ++ lib.optional withWebSockets qtwebsockets
    ;
  
    buildInputs = [
      dbus
      qtbase
      qtsvg
      qtdeclarative
    ]
      ++ lib.optional withConnectivity qtconnectivity
      ++ lib.optional withWebKit qtwebkit
      ++ lib.optional withWebSockets qtwebsockets
    ;
  
    propagatedBuildInputs = [
      dbus-python
      sip
    ] ++ lib.optional (!isPy3k) enum34;
  
    patches = [
      # Fix some wrong assumptions by ./configure.py
      # TODO: figure out how to send this upstream
      ./pyqt5-fix-dbus-mainloop-support.patch
    ];
  
    passthru = {
      inherit sip;
    };
  
    configurePhase = ''
      runHook preConfigure
  