anchor.diff:  
   let
     pname = "PyQt";
  -  version = "5.10.1";
  +  version = "5.11.3";
   
  -  inherit (pythonPackages) buildPythonPackage python dbus-python sip;
  +  inherit (pythonPackages) buildPythonPackage python isPy3k dbus-python sip enum34;
   
   in buildPythonPackage {
     pname = pname;
  
positive.code:     runHook postConfigure
    '';
  
    patches = [
      # This patch from Arch Linux fixes Cura segfaulting on startup
      # https://github.com/Ultimaker/Cura/issues/3438
      # It can probably removed on 5.10.3
      (fetchpatch {
        name = "pyqt5-cura-crash.patch";
        url = https://git.archlinux.org/svntogit/packages.git/plain/repos/extra-x86_64/pyqt5-cura-crash.patch?id=6cfe64a3d1827e0ed9cc62f1683a53b582315f4f;
        sha256 = "02a0mw1z8p9hhqhl4bgjrmf1xq82xjmpivn5bg6r4yv6pidsh7ck";
      })
      (fetchpatch {
        name = "pyqt-qt5.11.patch";
        url = "https://git.archlinux.org/svntogit/packages.git/plain/trunk/pyqt-qt5.11.patch?h=packages/pyqt5&id=d01240b801203d3865b2f61fa19090cc20e55a97";
        sha256 = "0qa7w1agjg9da99lvnqwwxnm3pp7qd683h7zggq4c269y2km812h";
      })
      (fetchpatch {
        name = "pyqt-support-new-qt.patch";
        url = "https://git.archlinux.org/svntogit/packages.git/plain/trunk/pyqt-support-new-qt.patch?h=packages/pyqt5&id=d01240b801203d3865b2f61fa19090cc20e55a97";
        sha256 = "1nkl96f4bki37zw6iwvd4vq8z8gg45q5m1cbkbaw72395i0m7p5j";
      })
    ];
  
    postInstall = ''
      for i in $out/bin/*; do
        wrapProgram $i --prefix PYTHONPATH : "$PYTHONPATH"
  
negative.code: 
    propagatedBuildInputs = [
      sip qtbase qtsvg qtwebkit qtwebengine
    ] ++ lib.optional (!isPy3k) enum34 ++ lib.optional withWebSockets qtwebsockets ++ lib.optional withConnectivity qtconnectivity;
  
    configurePhase = ''
      runHook preConfigure
  