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/dlib/default.nix

@@ -0,0 +1,32 @@
+{ stdenv, buildPythonPackage, dlib, python, pytest, more-itertools
+, sse4Support ? stdenv.hostPlatform.sse4_1Support
+, avxSupport ? stdenv.hostPlatform.avxSupport
+}:
+
+buildPythonPackage {
+  inherit (dlib) name src nativeBuildInputs buildInputs meta;
+
+  # although AVX can be enabled, we never test with it. Some Hydra machines
+  # fail because of this, however their build results are probably used on hardware
+  # with AVX support.
+  checkPhase = ''
+    ${python.interpreter} nix_run_setup test --no USE_AVX_INSTRUCTIONS
+  '';
+
+  setupPyBuildFlags = [
+    "--set USE_SSE4_INSTRUCTIONS=${if sse4Support then "yes" else "no"}"
+    "--set USE_AVX_INSTRUCTIONS=${if avxSupport then "yes" else "no"}"
+  ];
+
+  patches = [ ./build-cores.patch ];
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "more-itertools<6.0.0" "more-itertools" \
+      --replace "pytest==3.8" "pytest"
+  '';
+
+  checkInputs = [ pytest more-itertools ];
+
+  dontUseCmakeConfigure = true;
+}