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-compat/default.nix

@@ -0,0 +1,42 @@
+{ lib, buildPythonPackage, fetchFromGitHub, python,
+  django, six
+}:
+
+buildPythonPackage rec {
+  pname = "django-compat";
+  version = "1.0.15";
+
+  # the pypi packages don't include everything required for the tests
+  src = fetchFromGitHub {
+    owner = "arteria";
+    repo = "django-compat";
+    rev = "v${version}";
+    sha256 = "1pr6v38ahrsvxlgmcx69s4b5q5082f44gzi4h3c32sccdc4pwqxp";
+  };
+
+  patches = [
+    ./fix-tests.diff
+  ];
+
+  checkPhase = ''
+    runHook preCheck
+
+    # to convince the tests to run against the installed package, not the source directory, we extract the
+    # tests directory from it then dispose of the actual source
+    mv compat/tests .
+    rm -r compat
+    substituteInPlace runtests.py --replace compat.tests tests
+    ${python.interpreter} runtests.py
+
+    runHook postCheck
+  '';
+
+  propagatedBuildInputs = [ django six ];
+
+  meta = with lib; {
+    description = "Forward and backwards compatibility layer for Django 1.4, 1.7, 1.8, 1.9, 1.10 and 1.11";
+    homepage = "https://github.com/arteria/django-compat";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ris ];
+  };
+}