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/signedjson/default.nix

@@ -0,0 +1,53 @@
+{ lib
+, buildPythonPackage
+, canonicaljson
+, fetchPypi
+, importlib-metadata
+, pynacl
+, pytestCheckHook
+, pythonOlder
+, setuptools-scm
+, typing-extensions
+, unpaddedbase64
+}:
+
+buildPythonPackage rec {
+  pname = "signedjson";
+  version = "1.1.4";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-zZHFavU/Fp7wMsYunEoyktwViGaTMxjQWS40Yts9ZJI=";
+  };
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    canonicaljson
+    unpaddedbase64
+    pynacl
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    importlib-metadata
+    typing-extensions
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "signedjson"
+  ];
+
+  meta = with lib; {
+    description = "Sign JSON with Ed25519 signatures";
+    homepage = "https://github.com/matrix-org/python-signedjson";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ ];
+  };
+}