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/casbin/default.nix

@@ -0,0 +1,47 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, simpleeval
+, pythonOlder
+, coveralls
+, wcmatch
+}:
+
+buildPythonPackage rec {
+  pname = "casbin";
+  version = "1.16.5";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = pname;
+    repo = "pycasbin";
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-27j1iuqf0af4Cm3r32FJnWnjvvUcacuv2+1OL6z/mwM=";
+  };
+
+  propagatedBuildInputs = [
+    simpleeval
+    wcmatch
+  ];
+
+  checkInputs = [
+    coveralls
+  ];
+
+  checkPhase = ''
+    coverage run -m unittest discover -s tests -t tests
+  '';
+
+  pythonImportsCheck = [
+    "casbin"
+  ];
+
+  meta = with lib; {
+    description = "An authorization library that supports access control models like ACL, RBAC, ABAC in Python";
+    homepage = "https://github.com/casbin/pycasbin";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ costrouc ];
+  };
+}