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/fixtures/default.nix

@@ -0,0 +1,53 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, fetchpatch
+, pythonAtLeast
+, pbr
+, testtools
+, mock
+, python
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "fixtures";
+  version = "3.0.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "fcf0d60234f1544da717a9738325812de1f42c2fa085e2d9252d8fff5712b2ef";
+  };
+
+  patches = lib.optional (pythonAtLeast "3.9") [
+    # drop tests that try to monkeypatch a classmethod, which fails on python3.9
+    # https://github.com/testing-cabal/fixtures/issues/44
+    (fetchpatch {
+       url = "https://salsa.debian.org/openstack-team/python/python-fixtures/-/raw/debian/victoria/debian/patches/remove-broken-monkey-patch-test.patch";
+       sha256 = "1s3hg2zmqc4shmnf90kscphzj5qlqpxghzw2a59p8f88zrbsj97r";
+    })
+  ];
+
+  nativeBuildInputs = [
+    pbr
+  ];
+
+  propagatedBuildInputs = [
+    testtools
+    six # not in install_requires, but used in fixture.py
+  ];
+
+  checkInputs = [
+    mock
+  ];
+
+  checkPhase = ''
+    ${python.interpreter} -m testtools.run fixtures.test_suite
+  '';
+
+  meta = {
+    description = "Reusable state for writing clean tests and more";
+    homepage = "https://pypi.python.org/pypi/fixtures";
+    license = lib.licenses.asl20;
+  };
+}