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/eth-utils/default.nix

@@ -0,0 +1,46 @@
+{ lib
+, fetchFromGitHub
+, buildPythonPackage
+, eth-hash
+, eth-typing
+, cytoolz
+, hypothesis
+, isPyPy
+, pytestCheckHook
+, pythonOlder
+, toolz
+}:
+
+buildPythonPackage rec {
+  pname = "eth-utils";
+  version = "2.0.0";
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "ethereum";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-E2vUROc2FcAv00k50YpdxaaYIRDk1yGSPB8cHHw+7Yw=";
+  };
+
+  propagatedBuildInputs = [
+    eth-hash
+    eth-typing
+  ] ++ lib.optional (!isPyPy) cytoolz
+  ++ lib.optional isPyPy toolz;
+
+
+  checkInputs = [
+    hypothesis
+    pytestCheckHook
+  ] ++ eth-hash.optional-dependencies.pycryptodome;
+
+  pythonImportsCheck = [ "eth_utils" ];
+
+  meta = {
+    description = "Common utility functions for codebases which interact with ethereum";
+    homepage = "https://github.com/ethereum/eth-utils";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ SuperSandro2000 ];
+  };
+}