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/databases/default.nix

@@ -0,0 +1,62 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, sqlalchemy
+, aiocontextvars
+, aiopg
+, pythonOlder
+, pytestCheckHook
+, pymysql
+, asyncpg
+, aiomysql
+, aiosqlite
+}:
+
+buildPythonPackage rec {
+  pname = "databases";
+  version = "0.5.5";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "encode";
+    repo = pname;
+    rev = version;
+    hash = "sha256-NOXK1UCQzqvJRfzsgIfpihuD9oF52sMD+BxqUHWF8Rk=";
+  };
+
+  propagatedBuildInputs = [
+    aiopg
+    aiomysql
+    aiosqlite
+    asyncpg
+    pymysql
+    sqlalchemy
+  ] ++ lib.optionals (pythonOlder "3.7") [
+    aiocontextvars
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  disabledTestPaths = [
+    # circular dependency on starlette
+    "tests/test_integration.py"
+    # TEST_DATABASE_URLS is not set.
+    "tests/test_databases.py"
+    "tests/test_connection_options.py"
+  ];
+
+  pythonImportsCheck = [
+    "databases"
+  ];
+
+  meta = with lib; {
+    description = "Async database support for Python";
+    homepage = "https://github.com/encode/databases";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ costrouc ];
+  };
+}