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/wsnsimpy/default.nix

@@ -0,0 +1,31 @@
+{ buildPythonPackage, fetchPypi, isPy27, lib, setuptools, simpy, tkinter
+# GUI-based visualization of the simulation is optional
+, enableVisualization ? true }:
+
+buildPythonPackage rec {
+  pname = "wsnsimpy";
+  version = "0.2.5";
+  disabled = isPy27;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1b7fdqwc2v9alfwf2fr0aqr8rf2pb5lpm4anpilmvrh2lhjar4i2";
+  };
+
+  propagatedBuildInputs = [ setuptools simpy ]
+    ++ lib.optional enableVisualization tkinter;
+
+  # No test cases are included, thus unittest tries to run the examples, which
+  # fail because no DISPLAYs are available.
+  doCheck = false;
+
+  pythonImportsCheck = [ "wsnsimpy" ]
+    ++ lib.optional enableVisualization "wsnsimpy.wsnsimpy_tk";
+
+  meta = with lib; {
+    description = "SimPy-based WSN Simulator";
+    homepage = "https://pypi.org/project/wsnsimpy/";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ dmrauh ];
+  };
+}