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/btrees/default.nix

@@ -0,0 +1,54 @@
+{ lib
+, fetchPypi
+, buildPythonPackage
+, persistent
+, zope_interface
+, transaction
+, zope_testrunner
+, python
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "btrees";
+  version = "4.10.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    pname = "BTrees";
+    inherit version;
+    hash = "sha256-1qsONBDQdNcVQkXW3GSTrobxtQvWCA0TEOuz7N6l3rY=";
+  };
+
+  propagatedBuildInputs = [
+    persistent
+    zope_interface
+  ];
+
+  checkInputs = [
+    transaction
+    zope_testrunner
+  ];
+
+  checkPhase = ''
+    runHook preCheck
+    ${python.interpreter} -m zope.testrunner --test-path=src --auto-color --auto-progress
+    runHook postCheck
+  '';
+
+  pythonImportsCheck = [
+    "BTrees.OOBTree"
+    "BTrees.IOBTree"
+    "BTrees.IIBTree"
+    "BTrees.IFBTree"
+  ];
+
+  meta = with lib; {
+    description = "Scalable persistent components";
+    homepage = "http://packages.python.org/BTrees";
+    license = licenses.zpl21;
+    maintainers = with maintainers; [ ];
+  };
+}