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/zfec/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pyutil
+, setuptoolsTrial
+, twisted
+}:
+
+buildPythonPackage rec {
+  pname = "zfec";
+  version = "1.5.7.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-TuUZvg3MfaLohIK8/Av5d6Ql4dfoJ4z1u7uNAPiir7Y=";
+  };
+
+  propagatedBuildInputs = [ pyutil ];
+
+  checkInputs = [ setuptoolsTrial twisted ];
+
+  # argparse is in the stdlib but zfec doesn't know that.
+  postPatch = ''
+    sed -i -e '/argparse/d' setup.py
+  '';
+
+  pythonImportsCheck = [ "zfec" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/tahoe-lafs/zfec";
+    description = "Zfec, a fast erasure codec which can be used with the command-line, C, Python, or Haskell";
+    longDescription = ''
+      Fast, portable, programmable erasure coding a.k.a. "forward
+      error correction": the generation of redundant blocks of
+      information such that if some blocks are lost then the
+      original data can be recovered from the remaining blocks. The
+      zfec package includes command-line tools, C API, Python API,
+      and Haskell API.
+    '';
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ prusnak ];
+  };
+
+}