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/python-modules/lxml/default.nix

@@ -0,0 +1,35 @@
+{ stdenv, lib, buildPythonPackage, fetchFromGitHub
+, cython
+, libxml2
+, libxslt
+, zlib
+, xcodebuild
+}:
+
+buildPythonPackage rec {
+  pname = "lxml";
+  version = "4.8.0";
+
+  src = fetchFromGitHub {
+    owner = pname;
+    repo = pname;
+    rev = "lxml-${version}";
+    sha256 = "sha256-ppyLn8B0YFQivRCOE8TjKGdDDQHbb7UdTUkevznoVC8=";
+  };
+
+  # setuptoolsBuildPhase needs dependencies to be passed through nativeBuildInputs
+  nativeBuildInputs = [ libxml2.dev libxslt.dev cython ] ++ lib.optionals stdenv.isDarwin [ xcodebuild ];
+  buildInputs = [ libxml2 libxslt zlib ];
+
+  # tests are meant to be ran "in-place" in the same directory as src
+  doCheck = false;
+
+  pythonImportsCheck = [ "lxml" "lxml.etree" ];
+
+  meta = with lib; {
+    description = "Pythonic binding for the libxml2 and libxslt libraries";
+    homepage = "https://lxml.de";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ jonringer sjourdois ];
+  };
+}