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/python-crontab/default.nix

@@ -0,0 +1,31 @@
+{ lib, buildPythonPackage, fetchPypi, python-dateutil, pytestCheckHook }:
+
+buildPythonPackage rec {
+  pname = "python-crontab";
+  version = "2.6.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1e35ed7a3cdc3100545b43e196d34754e6551e7f95e4caebbe0e1c0ca41c2f1b";
+  };
+
+  checkInputs = [ pytestCheckHook ];
+  disabledTests = [
+    "test_07_non_posix_shell"
+    # doctest that assumes /tmp is writeable, awkward to patch
+    "test_03_usage"
+  ];
+
+  propagatedBuildInputs = [ python-dateutil ];
+
+  meta = with lib; {
+    description = "Python API for crontab";
+    longDescription = ''
+      Crontab module for reading and writing crontab files
+      and accessing the system cron automatically and simply using a direct API.
+    '';
+    homepage = "https://pypi.org/project/python-crontab/";
+    license = licenses.lgpl3Plus;
+    maintainers = with maintainers; [ kfollesdal ];
+  };
+}