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-etcd/default.nix

@@ -0,0 +1,37 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, nose
+, mock
+, pyopenssl
+, urllib3
+, dnspython
+}:
+
+buildPythonPackage rec {
+  pname = "python-etcd";
+  version = "0.4.5";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "f1b5ebb825a3e8190494f5ce1509fde9069f2754838ed90402a8c11e1f52b8cb";
+  };
+
+  buildInputs = [ nose mock pyopenssl ];
+
+  propagatedBuildInputs = [ urllib3 dnspython ];
+
+  postPatch = ''
+    sed -i '19s/dns/"dnspython"/' setup.py
+  '';
+
+  # Some issues with etcd not in path even though most tests passed
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A python client for Etcd";
+    homepage = "https://github.com/jplana/python-etcd";
+    license = licenses.mit;
+  };
+
+}