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/canmatrix/default.nix

@@ -0,0 +1,64 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+, attrs
+, bitstruct
+, click
+, future
+, pathlib2
+, typing ? null
+, lxml
+, xlwt
+, xlrd
+, XlsxWriter
+, pyyaml
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "canmatrix";
+  version = "0.9.5";
+
+  # uses fetchFromGitHub as PyPi release misses test/ dir
+  src = fetchFromGitHub {
+    owner = "ebroecker";
+    repo = pname;
+    rev = version;
+    sha256 = "0x8x8kbg4gyzi0ia9657xygp0mqfii76b67fsx76d31bqsdvlda5";
+  };
+
+  propagatedBuildInputs = [
+    # required
+    attrs
+    bitstruct
+    click
+    future
+    pathlib2
+    # optional
+    lxml
+    xlwt
+    xlrd
+    XlsxWriter
+    pyyaml
+  ] ++ lib.optional (pythonOlder "3.5") typing;
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "version = versioneer.get_version()" "version = \"${version}\""
+  '';
+
+  checkInputs = [ pytestCheckHook ];
+  # long_envvar_name_imports requires stable key value pair ordering
+  pytestFlagsArray = [ "-s src/canmatrix" ];
+  disabledTests = [ "long_envvar_name_imports" ];
+  pythonImportsCheck = [ "canmatrix" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/ebroecker/canmatrix";
+    description = "Support and convert several CAN (Controller Area Network) database formats .arxml .dbc .dbf .kcd .sym fibex xls(x)";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ sorki ];
+  };
+}
+