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/py3dns/default.nix

@@ -0,0 +1,30 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "py3dns";
+  version = "3.2.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1r25f0ys5p37bhld7m7n4gb0lrysaym3w318w2f8bncq7r3d81qz";
+  };
+
+  preConfigure = ''
+    sed -i \
+      -e '/import DNS/d' \
+      -e 's/DNS.__version__/"${version}"/g' \
+      setup.py
+  '';
+
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Python 3 DNS library";
+    homepage = "https://launchpad.net/py3dns";
+    license = licenses.psfl;
+  };
+
+}