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/pyxnat/default.nix

@@ -0,0 +1,47 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, nose
+, lxml
+, requests
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "pyxnat";
+  version = "1.4";
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "22524120d744b50d25ef6bfc7052637e4ead9e2afac92563231ec89848f5adf5";
+  };
+
+  propagatedBuildInputs = [
+    lxml
+    requests
+    six
+  ];
+
+  # future is not used, and pathlib is installed part of python38+
+  # w/o an external package
+  prePatch = ''
+    substituteInPlace setup.py \
+      --replace "pathlib>=1.0" "" \
+      --replace "future>=0.16" ""
+  '';
+
+  checkInputs = [ nose ];
+  checkPhase = "nosetests pyxnat/tests";
+  doCheck = false;  # requires a docker container running an XNAT server
+
+  pythonImportsCheck = [ "pyxnat" ];
+
+  meta = with lib; {
+    homepage = "https://pyxnat.github.io/pyxnat";
+    description = "Python API to XNAT";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ bcdarwin ];
+  };
+}