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/alembic/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, Mako
+, python-dateutil
+, sqlalchemy
+, importlib-metadata
+, importlib-resources
+, pytest-xdist
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "alembic";
+  version = "1.7.7";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-SWEkgXPq186KIe+z3jePE7g5jmYw+rDrJY3HSoryTFg=";
+  };
+
+  propagatedBuildInputs = [
+    Mako
+    python-dateutil
+    sqlalchemy
+  ] ++ lib.optionals (pythonOlder "3.9") [
+    importlib-resources
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    importlib-metadata
+  ];
+
+  pythonImportsCheck = [
+    "alembic"
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+    pytest-xdist
+  ];
+
+  meta = with lib; {
+    homepage = "https://bitbucket.org/zzzeek/alembic";
+    description = "A database migration tool for SQLAlchemy";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}