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/applications/science/machine-learning/vowpal-wabbit/default.nix

@@ -0,0 +1,53 @@
+{ lib, stdenv, fetchFromGitHub, cmake, boost, flatbuffers, rapidjson, spdlog, zlib }:
+
+stdenv.mkDerivation rec {
+  pname = "vowpal-wabbit";
+  version = "9.0.1";
+
+  src = fetchFromGitHub {
+    owner = "VowpalWabbit";
+    repo = "vowpal_wabbit";
+    rev = version;
+    sha256 = "sha256-ZUurY2bmTKKIW4GR4oiIpLxb6DSRUNJI/EyNSOu9D9c=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  buildInputs = [
+    boost
+    flatbuffers
+    rapidjson
+    spdlog
+    zlib
+  ];
+
+  # -DBUILD_TESTS=OFF is set as both it saves time in the build and the default
+  # cmake flags appended by the builder include -DBUILD_TESTING=OFF for which
+  # this is the equivalent flag.
+  # Flatbuffers are an optional feature.
+  # BUILD_FLATBUFFERS=ON turns it on. This will still consume Flatbuffers as a
+  # system dependency
+  cmakeFlags = [
+    "-DVW_INSTALL=ON"
+    "-DBUILD_TESTS=OFF"
+    "-DBUILD_JAVA=OFF"
+    "-DBUILD_PYTHON=OFF"
+    "-DUSE_LATEST_STD=ON"
+    "-DRAPIDJSON_SYS_DEP=ON"
+    "-DFMT_SYS_DEP=ON"
+    "-DSPDLOG_SYS_DEP=ON"
+    "-DBUILD_FLATBUFFERS=ON"
+  ];
+
+  meta = with lib; {
+    description = "Machine learning system focused on online reinforcement learning";
+    homepage = "https://github.com/VowpalWabbit/vowpal_wabbit/";
+    license = licenses.bsd3;
+    longDescription = ''
+      Machine learning system which pushes the frontier of machine learning with techniques such as online,
+      hashing, allreduce, reductions, learning2search, active, and interactive and reinforcement learning
+    '';
+    maintainers = with maintainers; [ jackgerrits ];
+    platforms = platforms.unix;
+  };
+}