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/watermark/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, fetchFromGitHub
+, buildPythonPackage
+, importlib-metadata
+, ipython
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "watermark";
+  version = "2.3.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "rasbt";
+    repo = pname;
+    rev = "refs/tags/${version}";
+    hash = "sha256-E3UxdGlxTcvkiKa3RoG9as6LybyW+QrCUZvA9VHwxlk=";
+  };
+
+  propagatedBuildInputs = [
+    ipython
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    importlib-metadata
+  ];
+
+  checkInputs =  [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "watermark"
+  ];
+
+  meta = with lib; {
+    description = "IPython extension for printing date and timestamps, version numbers, and hardware information";
+    homepage = "https://github.com/rasbt/watermark";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ nphilou ];
+  };
+}