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/keras-preprocessing/default.nix

@@ -0,0 +1,35 @@
+{ lib, buildPythonPackage, fetchPypi, numpy, six, scipy, pillow, pytest, keras }:
+
+buildPythonPackage rec {
+  pname = "Keras_Preprocessing";
+  version = "1.1.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "add82567c50c8bc648c14195bf544a5ce7c1f76761536956c3d2978970179ef3";
+  };
+
+  propagatedBuildInputs = [
+    # required
+    numpy six
+    # optional
+    scipy pillow
+  ];
+
+  checkInputs = [
+    pytest keras
+  ];
+
+  checkPhase = ''
+    py.test tests/
+  '';
+
+  # Cyclic dependency: keras-preprocessing's tests require Keras, which requires keras-preprocessing
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Easy data preprocessing and data augmentation for deep learning models";
+    homepage = "https://github.com/keras-team/keras-preprocessing";
+    license = licenses.mit;
+  };
+}