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/mlxtend/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, isPy27
+, pytestCheckHook
+, scipy
+, numpy
+, scikit-learn
+, pandas
+, matplotlib
+, joblib
+}:
+
+buildPythonPackage rec {
+  pname = "mlxtend";
+  version = "0.19.0";
+  disabled = isPy27;
+
+  src = fetchFromGitHub {
+    owner = "rasbt";
+    repo = pname;
+    rev = version;
+    sha256 = "0qawzlzv4zf612n9n03fxnz6gxmzschq0ykh9dgv70l33ihmjbaw";
+  };
+
+  checkInputs = [ pytestCheckHook ];
+  # image tests download files over the network
+  pytestFlagsArray = [ "-sv" "--ignore=mlxtend/image" ];
+  # Fixed in master, but failing in release version
+  # see: https://github.com/rasbt/mlxtend/pull/721
+  disabledTests = [ "test_variance_explained_ratio" ];
+
+  propagatedBuildInputs = [
+    scipy
+    numpy
+    scikit-learn
+    pandas
+    matplotlib
+    joblib
+  ];
+
+  meta = with lib; {
+    description = "A library of Python tools and extensions for data science";
+    homepage = "https://github.com/rasbt/mlxtend";
+    license= licenses.bsd3;
+    maintainers = with maintainers; [ evax ];
+    platforms = platforms.unix;
+    # incompatible with nixpkgs scikit-learn version
+    broken = true;
+  };
+}