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-xmp-toolkit/default.nix

@@ -0,0 +1,47 @@
+{ buildPythonPackage
+, exempi
+, fetchFromGitHub
+, mock
+, pythonOlder
+, pytz
+, lib, stdenv
+}:
+
+buildPythonPackage {
+  pname = "python-xmp-toolkit";
+  version = "2.0.2";
+
+  # PyPi has version 2.0.1; the tests fail
+  # There are commits for a 2.0.2 release that was never published
+  # Not to github, not to PyPi
+  # This is the latest commit from Jun 29, 2017 (as of Mar 13, 2019)
+  # It includes the commits for the unreleased version 2.0.2 and more
+  # Tests pass with this version
+  src = fetchFromGitHub {
+    owner = "python-xmp-toolkit";
+    repo = "python-xmp-toolkit";
+    rev = "5692bdf8dac3581a0d5fb3c5aeb29be0ab6a54fc";
+    sha256 = "16bylcm183ilzp7mrpdzw0pzp6csv9v5v247914qsv2abg0hgl5y";
+  };
+
+  buildInputs = [ exempi ];
+
+  checkInputs = lib.optionals (pythonOlder "3.3") [ mock ];
+
+  propagatedBuildInputs = [ pytz ];
+
+  postPatch = ''
+    substituteInPlace libxmp/exempi.py \
+      --replace "ctypes.util.find_library('exempi')" "'${exempi}/lib/libexempi${stdenv.hostPlatform.extensions.sharedLibrary}'"
+  '';
+
+  # hangs on darwin + sandbox
+  doCheck = !stdenv.isDarwin;
+
+  meta = with lib; {
+    homepage = "https://github.com/python-xmp-toolkit/python-xmp-toolkit";
+    description = "Python XMP Toolkit for working with metadata";
+    license = licenses.bsd3;
+    maintainers = [ maintainers.kiwi ];
+  };
+}