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/libagent/default.nix

@@ -0,0 +1,33 @@
+{ lib, fetchFromGitHub, buildPythonPackage, ed25519, ecdsa , semver, mnemonic
+, unidecode, mock, pytest , backports-shutil-which, configargparse
+, python-daemon, pymsgbox, pynacl }:
+
+# XXX: when changing this package, please test the package onlykey-agent.
+
+buildPythonPackage rec {
+  pname = "libagent";
+  version = "0.14.4";
+
+  src = fetchFromGitHub {
+    owner = "romanz";
+    repo = "trezor-agent";
+    rev = "v${version}";
+    sha256 = "1ksv494xpga27ifrjyn1bkqaya5h769lqb9rx1ng0n4kvmnrqr3l";
+  };
+
+  propagatedBuildInputs = [ unidecode backports-shutil-which configargparse
+    python-daemon pymsgbox ecdsa ed25519 mnemonic semver pynacl ];
+
+  checkInputs = [ mock pytest ];
+
+  checkPhase = ''
+    py.test libagent/tests
+  '';
+
+  meta = with lib; {
+    description = "Using hardware wallets as SSH/GPG agent";
+    homepage = "https://github.com/romanz/trezor-agent";
+    license = licenses.lgpl3Only;
+    maintainers = with maintainers; [ np ];
+  };
+}