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/python-ipmi/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, future
+, mock
+, nose
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "python-ipmi";
+  version = "0.5.2";
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "kontron";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-VXWSoVRfgJWf9rOT4SE1mTJdeNmzR3TRc2pc6Pp1M5U=";
+  };
+
+  propagatedBuildInputs = [
+    future
+  ];
+
+  checkInputs = [
+    mock
+    nose
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "pyipmi" ];
+
+  meta = with lib; {
+    description = "Python IPMI Library";
+    homepage = "https://github.com/kontron/python-ipmi";
+    license = with licenses; [ lgpl2Plus ];
+    maintainers = with maintainers; [ fab ];
+  };
+}