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/pymemcache/default.nix

@@ -0,0 +1,49 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, six
+, future
+, mock
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "pymemcache";
+  version = "3.5.1";
+  format = "setuptools";
+
+  src = fetchFromGitHub {
+    owner = "pinterest";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-DKqfv5gf9gzbnEPQSzy2mAaVYJZL9jmTKyGWVzj40T4=";
+  };
+
+  propagatedBuildInputs = [
+    six
+  ];
+
+  checkInputs = [
+    future
+    mock
+    pytestCheckHook
+  ];
+
+  postPatch = ''
+    sed -i "/--cov/d" setup.cfg
+  '';
+
+  disabledTests = [
+    # python-memcached is not available (last release in 2017)
+    "TestClientSocketConnect"
+  ];
+
+  pythonImportsCheck = [ "pymemcache" ];
+
+  meta = with lib; {
+    description = "Python memcached client";
+    homepage = "https://pymemcache.readthedocs.io/";
+    license = with licenses; [ asl20 ];
+    maintainers = with maintainers; [ fab ];
+  };
+}