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/greenlet/default.nix

@@ -0,0 +1,33 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPyPy
+, python
+}:
+
+
+buildPythonPackage rec {
+  pname = "greenlet";
+  version = "1.1.2";
+  disabled = isPyPy;  # builtin for pypy
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "e30f5ea4ae2346e62cedde8794a56858a67b878dd79f7df76a0767e356b1744a";
+  };
+
+  checkPhase = ''
+    runHook preCheck
+    ${python.interpreter} -m unittest discover -v greenlet.tests
+    runHook postCheck
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/python-greenlet/greenlet";
+    description = "Module for lightweight in-process concurrent programming";
+    license = with licenses; [
+      psfl  # src/greenlet/slp_platformselect.h & files in src/greenlet/platform/ directory
+      mit
+    ];
+  };
+}