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/orm/default.nix

@@ -0,0 +1,52 @@
+{ lib
+, aiomysql
+, aiosqlite
+, asyncpg
+, buildPythonPackage
+, databases
+, fetchFromGitHub
+, pythonOlder
+, typesystem
+}:
+
+buildPythonPackage rec {
+  pname = "orm";
+  version = "0.3.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "encode";
+    repo = "orm";
+    rev = version;
+    hash = "sha256-nlKEWdqttFnjBnXutlxTy9oILqFzKHKKPJpTtCUbJ5k=";
+  };
+
+  propagatedBuildInputs = [
+    aiomysql
+    aiosqlite
+    asyncpg
+    databases
+    typesystem
+  ];
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "typesystem==0.3.1" "typesystem"
+  '';
+
+  # Tests require databases
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "orm"
+  ];
+
+  meta = with lib; {
+    description = "An async ORM";
+    homepage = "https://github.com/encode/orm";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ costrouc ];
+  };
+}