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/pyads/default.nix

@@ -0,0 +1,46 @@
+{ lib
+, adslib
+, buildPythonPackage
+, fetchFromGitHub
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "pyads";
+  version = "3.3.9";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "stlehmann";
+    repo = pname;
+    rev = version;
+    sha256 = "sha256-eNouFJQDgp56fgkA7wZKfosKWOKU6OvXRjFwjCMvZqI=";
+  };
+
+  buildInputs = [
+    adslib
+  ];
+
+  patchPhase = ''
+    substituteInPlace pyads/pyads_ex.py \
+      --replace "ctypes.CDLL(adslib)" "ctypes.CDLL(\"${adslib}/lib/adslib.so\")"
+  '';
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "pyads"
+  ];
+
+  meta = with lib; {
+    description = "Python wrapper for TwinCAT ADS library";
+    homepage = "https://github.com/MrLeeh/pyads";
+    license = licenses.mit;
+    maintainers = with maintainers; [ jamiemagee ];
+  };
+}