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/django-cache-url/default.nix

@@ -0,0 +1,31 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  version = "3.2.2";
+  pname = "django-cache-url";
+
+  src = fetchFromGitHub {
+    owner = "epicserve";
+    repo = "django-cache-url";
+    rev = "v${version}";
+    sha256 = "0fxma2w6zl3cfl6wnynmlmp8snks67ffz4jcq4qmdc65xv1l204l";
+  };
+
+  postPatch = ''
+    # disable coverage tests
+    sed -i '/--cov/d' setup.cfg
+  '';
+
+  checkInputs = [ pytestCheckHook ];
+
+  meta = with lib; {
+    homepage = "https://github.com/epicserve/django-cache-url";
+    description = "Use Cache URLs in your Django application";
+    license = licenses.mit;
+    maintainers = [ maintainers.costrouc ];
+  };
+}