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/ffcv/default.nix

@@ -0,0 +1,54 @@
+{ buildPythonPackage
+, fetchFromGitHub
+, lib
+, libjpeg
+, numba
+, opencv4
+, pandas
+, pkg-config
+, pytorch-pfn-extras
+, terminaltables
+, tqdm
+}:
+
+buildPythonPackage rec {
+  pname = "ffcv";
+  version = "0.0.3";
+
+  src = fetchFromGitHub {
+    owner = "libffcv";
+    repo = pname;
+    # See https://github.com/libffcv/ffcv/issues/158.
+    rev = "131d56235eca3f1497bb84eeaec82c3434ef25d8";
+    sha256 = "0f7q2x48lknnf98mqaa35my05qwvdgv0h8l9lpagdw6yhx0a6p2x";
+  };
+
+  # See https://github.com/libffcv/ffcv/issues/159.
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "'assertpy'," "" \
+      --replace "'fastargs'," "" \
+      --replace "'imgcat'," "" \
+      --replace "'matplotlib'," "" \
+      --replace "'psutil'," "" \
+      --replace "'sklearn'," "" \
+      --replace "'webdataset'," ""
+  '';
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ libjpeg ];
+  propagatedBuildInputs = [ opencv4 numba pandas pytorch-pfn-extras terminaltables tqdm ];
+
+  # `ffcv._libffcv*.so` cannot be loaded in the nix build environment for some
+  # reason. See https://github.com/NixOS/nixpkgs/pull/160441#issuecomment-1045204722.
+  doCheck = false;
+
+  pythonImportsCheck = [ "ffcv" ];
+
+  meta = with lib; {
+    description = "FFCV: Fast Forward Computer Vision";
+    homepage = "https://ffcv.io";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ samuela ];
+  };
+}