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/pkuseg/default.nix

@@ -0,0 +1,36 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+, pythonAtLeast
+, cython
+, numpy
+}:
+
+buildPythonPackage rec {
+  pname = "pkuseg";
+  version = "0.0.25";
+
+  disabled = !isPy3k || pythonAtLeast "3.9";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "148yp0l7h8cflxag62pc1iwj5b5liyljnaxwfjaiqwl96vwjn0fx";
+  };
+
+  # Does not seem to have actual tests, but unittest discover
+  # recognizes some non-tests as tests and fails.
+  doCheck = false;
+
+  nativeBuildInputs = [ cython ];
+
+  propagatedBuildInputs = [ numpy ];
+
+  pythonImportsCheck = [ "pkuseg" ];
+
+  meta = with lib; {
+    description = "Toolkit for multi-domain Chinese word segmentation";
+    homepage = "https://github.com/lancopku/pkuseg-python";
+    license = licenses.unfree;
+  };
+}