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/proxy-py/default.nix

@@ -0,0 +1,65 @@
+{ stdenv
+, lib
+, buildPythonPackage
+, fetchFromGitHub
+, openssl
+, paramiko
+, pytest-asyncio
+, pytest-mock
+, pytestCheckHook
+, pythonOlder
+, setuptools-scm
+, typing-extensions
+}:
+
+buildPythonPackage rec {
+  pname = "proxy-py";
+  version = "2.4.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "abhinavsingh";
+    repo = "proxy.py";
+    rev = "v${version}";
+    sha256 = "sha256-VagX7ATVu6AT4POWoG9btizxFeBh9MLXiLpavtfXnyM=";
+  };
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    paramiko
+    typing-extensions
+  ];
+
+  checkInputs = [
+    openssl
+    pytest-asyncio
+    pytest-mock
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    export HOME=$(mktemp -d);
+  '';
+
+  postPatch = ''
+    substituteInPlace requirements.txt \
+      --replace "typing-extensions==3.7.4.3" "typing-extensions"
+  '';
+
+  pythonImportsCheck = [
+    "proxy"
+  ];
+
+  meta = with lib; {
+    broken = (stdenv.isLinux && stdenv.isAarch64) || stdenv.isDarwin;
+    description = "Python proxy framework";
+    homepage = "https://github.com/abhinavsingh/proxy.py";
+    license = with licenses; [ bsd3 ];
+    maintainers = with maintainers; [ fab ];
+  };
+}