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/applications/graphics/qvge/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, substituteAll
+, wrapQtAppsHook
+, qmake
+, qtsvg
+, qtx11extras
+, graphviz
+}:
+
+stdenv.mkDerivation rec {
+  pname = "qvge";
+  version = "0.6.3";
+
+  src = fetchFromGitHub {
+    owner = "ArsMasiuk";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-rtbUAp3l0VZsu+D9HCHM3q0UkDLflw50rYRq/LP4Wu4=";
+  };
+
+  sourceRoot = "${src.name}/src";
+
+  patches = (substituteAll {
+    src = ./set-graphviz-path.patch;
+    inherit graphviz;
+  });
+
+  nativeBuildInputs = [ wrapQtAppsHook qmake ];
+
+  buildInputs = if stdenv.isDarwin then [ qtsvg ] else [ qtx11extras ];
+
+  meta = with lib; {
+    description = "Qt Visual Graph Editor";
+    homepage = "https://github.com/ArsMasiuk/qvge";
+    license = licenses.mit;
+    maintainers = with maintainers; [ sikmir ];
+    platforms = platforms.unix;
+  };
+}

pkgs/applications/graphics/qvge/set-graphviz-path.patch

@@ -0,0 +1,13 @@
+diff --git i/commonui/CNodeEditorUIController.cpp w/commonui/CNodeEditorUIController.cpp
+index 7dacd48..64983e4 100644
+--- i/commonui/CNodeEditorUIController.cpp
++++ w/commonui/CNodeEditorUIController.cpp
+@@ -123,7 +123,7 @@ CNodeEditorUIController::CNodeEditorUIController(CMainWindow *parent) :
+ 	QString pathToGraphviz = QCoreApplication::applicationDirPath() + "/../tools/graphviz";
+ 	m_optionsData.graphvizPath = QFileInfo(pathToGraphviz).absoluteFilePath();
+ #else
+-	m_optionsData.graphvizPath = "";
++	m_optionsData.graphvizPath = "@graphviz@/bin";
+ #endif
+ 	m_gvController->setPathToGraphviz(m_optionsData.graphvizPath);
+