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/buildbot/pkg.nix

@@ -0,0 +1,31 @@
+{ lib, buildPythonPackage, fetchPypi, isPy3k, buildbot }:
+
+buildPythonPackage rec {
+  pname = "buildbot-pkg";
+  inherit (buildbot) version;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-CYbMixfZZ1xypV0J7TW54n/fja9RGMlWiF7StJYFnqM=";
+  };
+
+  postPatch = ''
+    # Their listdir function filters out `node_modules` folders.
+    # Do we have to care about that with Nix...?
+    substituteInPlace buildbot_pkg.py --replace "os.listdir = listdir" ""
+  '';
+
+  # No tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "buildbot_pkg" ];
+
+  disabled = !isPy3k;
+
+  meta = with lib; {
+    homepage = "https://buildbot.net/";
+    description = "Buildbot Packaging Helper";
+    maintainers = with maintainers; [ ryansydnor lopsided98 ];
+    license = licenses.gpl2;
+  };
+}