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/attrdict/default.nix

@@ -0,0 +1,56 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, coverage
+, pythonOlder
+, nose
+, pytestCheckHook
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "attrdict";
+  version = "2.0.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-NckGmLVcaDlGCRF3F3qenAcToIYPDgSf69cmSczXe3A=";
+  };
+
+  propagatedBuildInputs = [
+    six
+  ];
+
+  checkInputs = [
+    coverage
+    nose
+  ];
+
+  postPatch = ''
+    substituteInPlace attrdict/merge.py \
+      --replace "from collections" "from collections.abc"
+    substituteInPlace attrdict/mapping.py \
+      --replace "from collections" "from collections.abc"
+    substituteInPlace attrdict/default.py \
+      --replace "from collections" "from collections.abc"
+    substituteInPlace attrdict/mixins.py \
+      --replace "from collections" "from collections.abc"
+  '';
+
+  # Tests are not shipped and source is not tagged
+  doCheck = false;
+
+  pythonImportsCheck = [
+    "attrdict"
+  ];
+
+  meta = with lib; {
+    description = "A dict with attribute-style access";
+    homepage = "https://github.com/bcj/AttrDict";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}