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-rlp/default.nix

@@ -0,0 +1,42 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, eth-hash
+, eth-utils
+, hexbytes
+, pytestCheckHook
+, pythonOlder
+, rlp
+}:
+
+buildPythonPackage rec {
+  pname = "eth-rlp";
+  version = "0.3.0";
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "ethereum";
+    repo = "eth-rlp";
+    rev = "v${version}";
+    sha256 = "sha256-wfmRjHFu6H3J6hNin8ZA2454xXrLgcUdeR8iGXFomRE=";
+  };
+
+  propagatedBuildInputs = [
+    hexbytes
+    eth-utils
+    rlp
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ] ++ eth-hash.optional-dependencies.pycryptodome;
+
+  pythonImportsCheck = [ "eth_rlp" ];
+
+  meta = with lib; {
+    description = "RLP definitions for common Ethereum objects";
+    homepage = "https://github.com/ethereum/eth-rlp";
+    license = licenses.mit;
+    maintainers = with maintainers; [ SuperSandro2000 ];
+  };
+}