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/development/libraries/science/electronics/qcsxcad/default.nix

@@ -0,0 +1,47 @@
+{ lib
+, mkDerivation
+, fetchFromGitHub
+, cmake
+, csxcad
+, tinyxml
+, vtkWithQt5
+, qtbase
+}:
+
+mkDerivation {
+  pname = "qcsxcad";
+  version = "unstable-2020-01-04";
+
+  src = fetchFromGitHub {
+    owner = "thliebig";
+    repo = "QCSXCAD";
+    rev = "0dabbaf2bc1190adec300871cf309791af842c8e";
+    sha256 = "11kbh0mxbdfh7s5azqin3i2alic5ihmdfj0jwgnrhlpjk4cbf9rn";
+  };
+
+  outputs = [ "out" "dev" ];
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  cmakeFlags = [
+    "-DCSXCAD_ROOT_DIR=${csxcad}"
+    "-DENABLE_RPATH=OFF"
+  ];
+
+  buildInputs = [
+    csxcad
+    tinyxml
+    vtkWithQt5
+    qtbase
+  ];
+
+  meta = with lib; {
+    description = "Qt library for CSXCAD";
+    homepage = "https://github.com/thliebig/QCSXCAD";
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ matthuszagh ];
+    platforms = platforms.linux;
+  };
+}