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/audio/volctl/default.nix

@@ -0,0 +1,56 @@
+{ lib, python3Packages, fetchFromGitHub, wrapGAppsHook, gobject-introspection, libpulseaudio, glib, gtk3, pango, xorg }:
+
+python3Packages.buildPythonApplication rec {
+  pname = "volctl";
+  version = "0.8.2";
+
+  src = fetchFromGitHub {
+    owner = "buzz";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "1cx27j83pz2qffnzb85fbl1x6pp3irv1kbw7g1hri7kaw6ky4xiz";
+  };
+
+  postPatch = ''
+    substituteInPlace volctl/lib/xwrappers.py \
+      --replace 'libXfixes.so' "${xorg.libXfixes}/lib/libXfixes.so" \
+      --replace 'libXfixes.so.3' "${xorg.libXfixes}/lib/libXfixes.so.3"
+  '';
+
+  preBuild = ''
+    export LD_LIBRARY_PATH=${libpulseaudio}/lib
+  '';
+
+  nativeBuildInputs = [
+    gobject-introspection
+    wrapGAppsHook
+  ];
+
+  propagatedBuildInputs = [ pango gtk3 ] ++ (with python3Packages; [
+    click
+    pycairo
+    pygobject3
+    pyyaml
+  ]);
+
+  # with strictDeps importing "gi.repository.Gtk" fails with "gi.RepositoryError: Typelib file for namespace 'Pango', version '1.0' not found"
+  strictDeps = false;
+
+  # no tests included
+  doCheck = false;
+
+  pythonImportsCheck = [ "volctl" ];
+
+  preFixup = ''
+    glib-compile-schemas ${glib.makeSchemaPath "$out" "${pname}-${version}"}
+    gappsWrapperArgs+=(--prefix LD_LIBRARY_PATH : "${libpulseaudio}/lib")
+  '';
+
+  meta = with lib; {
+    description = "PulseAudio enabled volume control featuring per-app sliders";
+    homepage = "https://buzz.github.io/volctl/";
+    license = licenses.gpl2;
+    platforms = platforms.linux;
+    maintainers = [ maintainers.romildo ];
+  };
+}