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/pyexcel/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+, chardet
+, lml
+, pyexcel-io
+, texttable
+}:
+
+buildPythonPackage rec {
+  pname = "pyexcel";
+  version = "0.7.0";
+
+  disabled = !isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-+/Du5dk7ls728ZqfAHA/IsCmTxlyjZG5VCgAmlISlwk=";
+  };
+
+  propagatedBuildInputs = [
+    chardet
+    lml
+    pyexcel-io
+    texttable
+  ];
+
+  pythonImportsCheck = [
+    "pyexcel"
+  ];
+
+  # Tests depend on pyexcel-xls & co. causing circular dependency.
+  # https://github.com/pyexcel/pyexcel/blob/dev/tests/requirements.txt
+  doCheck = false;
+
+  meta = {
+    description = "Single API for reading, manipulating and writing data in csv, ods, xls, xlsx and xlsm files";
+    homepage = "http://docs.pyexcel.org/";
+    license = lib.licenses.bsd3;
+    maintainers = with lib.maintainers; [ jtojnar ];
+  };
+}