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/keepkey_agent/default.nix

@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, keepkey
+, setuptools
+, libagent
+, wheel
+}:
+
+buildPythonPackage rec {
+  pname = "keepkey_agent";
+  version = "0.9.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "03779gvlx70i0nnry98i4pl1d92604ix5x6jgdfkrdgzqbh5vj27";
+  };
+
+  propagatedBuildInputs = [
+    keepkey libagent setuptools wheel
+  ];
+
+  doCheck = false;
+  pythonImportsChecks = [ "keepkey_agent" ];
+
+  meta = with lib; {
+    description = "Using KeepKey as hardware-based SSH/PGP agent";
+    homepage = "https://github.com/romanz/trezor-agent";
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ hkjn np mmahut ];
+  };
+}