uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/admin/virtscreen/default.nix

@@ -0,0 +1,56 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, python3Packages
+, x11vnc
+, xrandr
+, libGL
+, qt5
+}:
+
+python3Packages.buildPythonApplication rec {
+  pname = "virtscreen";
+  version = "0.3.1";
+
+  disabled = python3Packages.pythonOlder "3.6";
+
+  # No tests
+  doCheck = false;
+
+  src = fetchFromGitHub {
+    owner = "kbumsik";
+    repo = pname;
+    rev = version;
+    sha256 = "005qach6phz8w17k8kqmyd647c6jkfybczybxq0yxi5ik0s91a08";
+  };
+
+  nativeBuildInputs = [ qt5.wrapQtAppsHook ];
+
+  propagatedBuildInputs = with python3Packages; [
+    netifaces
+    pyqt5
+    quamash
+    x11vnc
+    xrandr
+  ];
+
+  dontWrapQtApps = true;
+
+  makeWrapperArgs = [
+    "\${qtWrapperArgs[@]}"
+    # import Qt.labs.platform failed without this
+    "--prefix QML2_IMPORT_PATH : ${qt5.qtquickcontrols2.bin}/${qt5.qtbase.qtQmlPrefix}"
+  ];
+
+  postPatch = ''
+    substituteInPlace virtscreen/__main__.py \
+      --replace "'GL'" "'${libGL}/lib/libGL${stdenv.hostPlatform.extensions.sharedLibrary}'" \
+  '';
+
+  meta = with lib; {
+    description = "Make your iPad/tablet/computer as a secondary monitor on Linux";
+    homepage = "https://github.com/kbumsik/VirtScreen";
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ borisbabic ];
+  };
+}