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/duo-client/default.nix

@@ -0,0 +1,47 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, mock
+, nose2
+, pytz
+, setuptools
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "duo-client";
+  version = "4.4.0";
+
+  src = fetchFromGitHub {
+    owner = "duosecurity";
+    repo = "duo_client_python";
+    rev = version;
+    sha256 = "sha256-2sodExb66+Y+aPvm+DkibPt0Bvwqjii+EoBWaopdq+E=";
+  };
+
+  postPatch = ''
+    substituteInPlace requirements-dev.txt \
+      --replace "dlint" "" \
+      --replace "flake8" ""
+  '';
+
+  propagatedBuildInputs = [
+    setuptools
+    six
+  ];
+
+  checkInputs = [
+    mock
+    nose2
+    pytz
+  ];
+
+  pythonImportsCheck = [ "duo_client" ];
+
+  meta = with lib; {
+    description = "Python library for interacting with the Duo Auth, Admin, and Accounts APIs";
+    homepage = "https://github.com/duosecurity/duo_client_python";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ SuperSandro2000 ];
+  };
+}