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/vaa/default.nix

@@ -0,0 +1,56 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, flit-core
+, pytestCheckHook
+, cerberus
+, django
+, djangorestframework
+, marshmallow
+, pyschemes
+, wtforms
+, email_validator
+}:
+
+buildPythonPackage rec {
+  pname = "vaa";
+  version = "0.2.1";
+  format = "pyproject";
+
+  src = fetchFromGitHub {
+    owner = "life4";
+    repo = pname;
+    rev = "refs/tags/v.${version}";
+    hash = "sha256-24GTTJSZ55ejyHoWP1/S3DLTKvOolAJr9UhWoOm84CU=";
+  };
+
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace "requires = [\"flit\"]" "requires = [\"flit_core\"]" \
+      --replace "build-backend = \"flit.buildapi\"" "build-backend = \"flit_core.buildapi\""
+  '';
+
+  nativeBuildInputs = [
+    flit-core
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+    cerberus
+    django
+    djangorestframework
+    marshmallow
+    pyschemes
+    wtforms
+    email_validator
+  ];
+
+  pythonImportsCheck = [ "vaa" ];
+
+  meta = with lib; {
+    description = "VAlidators Adapter makes validation by any existing validator with the same interface";
+    homepage = "https://github.com/life4/vaa";
+    license = licenses.mit;
+    maintainers = with maintainers; [ gador ];
+  };
+}