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/nevow/default.nix

@@ -0,0 +1,43 @@
+{ lib, buildPythonPackage, fetchPypi, isPy3k, twisted }:
+
+buildPythonPackage rec {
+  pname = "Nevow";
+  version = "0.14.5";
+  disabled = isPy3k;
+
+  src = fetchPypi {
+    inherit version pname;
+    sha256 = "afb6ba85a5351953578c018fcdb9dfbd62f29a8d46c58bc9652bc000a27223f3";
+  };
+
+  propagatedBuildInputs = [ twisted ];
+
+  checkInputs = [ twisted ];
+
+  checkPhase = ''
+    trial formless nevow
+  '';
+
+  meta = with lib; {
+    description = "Nevow, a web application construction kit for Python";
+    longDescription = ''
+      Nevow - Pronounced as the French "nouveau", or "noo-voh", Nevow
+      is a web application construction kit written in Python.  It is
+      designed to allow the programmer to express as much of the view
+      logic as desired in Python, and includes a pure Python XML
+      expression syntax named stan to facilitate this.  However it
+      also provides rich support for designer-edited templates, using
+      a very small XML attribute language to provide bi-directional
+      template manipulation capability.
+
+      Nevow also includes formless, a declarative syntax for
+      specifying the types of method parameters and exposing these
+      methods to the web.  Forms can be rendered automatically, and
+      form posts will be validated and input coerced, rendering error
+      pages if appropriate.  Once a form post has validated
+      successfully, the method will be called with the coerced values.
+    '';
+    homepage = "https://github.com/twisted/nevow";
+    license = licenses.mit;
+  };
+}