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/pyperf/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, six
+, statistics
+, pythonOlder
+, nose
+, psutil
+, contextlib2
+, mock
+, unittest2
+, isPy27
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "pyperf";
+  version = "2.3.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-SsLiz3JKubUlInw7SmnxarXHFOpbrWHJdODF1XhyOKE=";
+  };
+
+  checkInputs = [ nose psutil ] ++
+    lib.optionals isPy27 [ contextlib2 mock unittest2 ];
+  propagatedBuildInputs = [ six ] ++
+    lib.optionals (pythonOlder "3.4") [ statistics ];
+
+  # tests not included in pypi repository
+  doCheck = false;
+
+  checkPhase = ''
+    ${python.interpreter} -m nose
+  '';
+
+  meta = with lib; {
+    description = "Python module to generate and modify perf";
+    homepage = "https://pyperf.readthedocs.io/";
+    license = licenses.mit;
+    maintainers = [ maintainers.costrouc ];
+  };
+}