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/keyutils/default.nix

@@ -0,0 +1,28 @@
+{ lib, buildPythonPackage, fetchFromGitHub, keyutils, pytest-runner, pytest }:
+
+buildPythonPackage rec {
+  pname = "keyutils";
+  version = "0.6";
+
+  # github version comes bundled with tests
+  src = fetchFromGitHub {
+    owner = "sassoftware";
+    repo = "python-keyutils";
+    rev = version;
+    sha256 = "0pfqfr5xqgsqkxzrmj8xl2glyl4nbq0irs0k6ik7iy3gd3mxf5g1";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py --replace '"pytest-runner"' ""
+  '';
+
+  buildInputs = [ keyutils ];
+  checkInputs = [ pytest pytest-runner ];
+
+  meta = {
+    description = "A set of python bindings for keyutils";
+    homepage = "https://github.com/sassoftware/python-keyutils";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ primeos ];
+  };
+}