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/testpath/default.nix

@@ -0,0 +1,38 @@
+{ lib
+, stdenv
+, buildPythonPackage
+, fetchPypi
+, flit-core
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "testpath";
+  version = "0.6.0";
+  format = "pyproject";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-LxuX5kQsAmgevgG9hPUxAop8rqGvOCUAD1I0XDAoXg8=";
+  };
+
+  nativeBuildInputs = [
+    flit-core
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  preCheck = lib.optionalString stdenv.isDarwin ''
+    # Work around https://github.com/jupyter/testpath/issues/24
+    export TMPDIR="/tmp"
+  '';
+
+  meta = with lib; {
+    description = "Test utilities for code working with files and commands";
+    license = licenses.mit;
+    homepage = "https://github.com/jupyter/testpath";
+  };
+
+}