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/obfsproxy/default.nix

@@ -0,0 +1,36 @@
+{ lib
+, buildPythonPackage
+, fetchgit
+, pyptlib
+, twisted
+, pycrypto
+, pyyaml
+}:
+
+buildPythonPackage rec {
+  pname = "obfsproxy";
+  version = "0.2.13";
+
+  src = fetchgit {
+    url = "https://git.torproject.org/pluggable-transports/obfsproxy.git";
+    rev = "refs/tags/${pname}-${version}";
+    sha256 = "04ja1cl8xzqnwrd2gi6nlnxbmjri141bzwa5gybvr44d8h3k2nfa";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py --replace "version=versioneer.get_version()" "version='${version}'"
+    substituteInPlace setup.py --replace "argparse" ""
+  '';
+
+  propagatedBuildInputs = [ pyptlib twisted pycrypto pyyaml ];
+
+  # No tests in archive
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A pluggable transport proxy";
+    homepage = "https://www.torproject.org/projects/obfsproxy";
+    maintainers = with maintainers; [ thoughtpolice ];
+  };
+
+}