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/buildbot/worker.nix

@@ -0,0 +1,66 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, buildbot
+
+# patch
+, coreutils
+
+# propagates
+, autobahn
+, future
+, msgpack
+, twisted
+
+# tests
+, mock
+, parameterized
+, psutil
+, setuptoolsTrial
+
+# passthru
+, nixosTests
+}:
+
+buildPythonPackage (rec {
+  pname = "buildbot-worker";
+  inherit (buildbot) version;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-HZH3TdH5dhr3f6ev25O3SgPPNbiFGMmAp9DHwcb/2MA=";
+  };
+
+  postPatch = ''
+    substituteInPlace buildbot_worker/scripts/logwatcher.py \
+      --replace /usr/bin/tail "${coreutils}/bin/tail"
+  '';
+
+  nativeBuildInputs = [
+    setuptoolsTrial
+  ];
+
+  propagatedBuildInputs = [
+    autobahn
+    future
+    msgpack
+    twisted
+  ];
+
+  checkInputs = [
+    mock
+    parameterized
+    psutil
+  ];
+
+  passthru.tests = {
+    smoke-test = nixosTests.buildbot;
+  };
+
+  meta = with lib; {
+    homepage = "https://buildbot.net/";
+    description = "Buildbot Worker Daemon";
+    maintainers = with maintainers; [ ryansydnor lopsided98 ];
+    license = licenses.gpl2;
+  };
+})