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/misc/xflux/gui.nix

@@ -0,0 +1,49 @@
+{ lib, fetchFromGitHub, buildPythonApplication, python3Packages, wrapGAppsHook
+, xflux, librsvg, gtk3, gobject-introspection, pango, gdk-pixbuf, atk
+, pexpect, pygobject3, pyxdg, libappindicator-gtk3
+}:
+buildPythonApplication rec {
+  pname = "xflux-gui";
+  version = "1.2.0";
+
+  src = fetchFromGitHub {
+    repo = "xflux-gui";
+    owner = "xflux-gui";
+    rev = "v${version}";
+    sha256 = "09zphcd9821ink63636swql4g85hg6lpsazqg1mawlk9ikc8zbps";
+  };
+
+  propagatedBuildInputs = [
+    pyxdg
+    pexpect
+    pygobject3
+  ];
+
+  buildInputs = [
+    xflux gtk3
+  ];
+
+  nativeBuildInputs = [
+    wrapGAppsHook gobject-introspection
+    pango gdk-pixbuf atk libappindicator-gtk3
+  ];
+
+  postPatch = ''
+     substituteInPlace src/fluxgui/xfluxcontroller.py \
+       --replace "pexpect.spawn(\"xflux\"" "pexpect.spawn(\"${xflux}/bin/xflux\""
+  '';
+
+  postFixup = ''
+    wrapGAppsHook
+    wrapPythonPrograms
+    patchPythonScript $out/${python3Packages.python.sitePackages}/fluxgui/fluxapp.py
+  '';
+
+  meta = {
+    description = "Better lighting for Linux. Open source GUI for xflux";
+    homepage = "https://justgetflux.com/linux.html";
+    license = lib.licenses.unfree; # marked as unfree since the source code contains a copy of the unfree xflux binary
+    maintainers = [ lib.maintainers.sheenobu ];
+    platforms = lib.platforms.linux;
+  };
+}