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/flask-wtf/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, fetchPypi
+, buildPythonPackage
+, flask
+, itsdangerous
+, wtforms
+, email_validator
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "flask-wtf";
+  version = "1.0.1";
+
+  src = fetchPypi {
+    pname = "Flask-WTF";
+    inherit version;
+    sha256 = "34fe5c6fee0f69b50e30f81a3b7ea16aa1492a771fe9ad0974d164610c09a6c9";
+  };
+
+  propagatedBuildInputs = [
+    flask
+    itsdangerous
+    wtforms
+  ];
+
+  passthru.optional-dependencies = {
+    email = [ email_validator ];
+  };
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  meta = with lib; {
+    description = "Simple integration of Flask and WTForms.";
+    license = licenses.bsd3;
+    maintainers = [ maintainers.mic92 ];
+    homepage = "https://github.com/lepture/flask-wtf/";
+  };
+}