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/cerberus/default.nix

@@ -0,0 +1,46 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, setuptools
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "Cerberus";
+  version = "1.3.4";
+
+  src = fetchFromGitHub {
+    owner = "pyeve";
+    repo = "cerberus";
+    rev = version;
+    sha256 = "03kj15cf1pbd11mxsik96m5w1m6p0fbdc4ia5ihzmq8rz28razpq";
+  };
+
+  propagatedBuildInputs = [
+    setuptools
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    export TESTDIR=$(mktemp -d)
+    cp -R ./cerberus/tests $TESTDIR
+    pushd $TESTDIR
+  '';
+
+  postCheck = ''
+    popd
+  '';
+
+  pythonImportsCheck = [
+    "cerberus"
+  ];
+
+  meta = with lib; {
+    homepage = "http://python-cerberus.org/";
+    description = "Lightweight, extensible schema and data validation tool for Python dictionaries";
+    license = licenses.mit;
+  };
+}