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/mxnet/default.nix

@@ -0,0 +1,39 @@
+{ lib
+, buildPythonPackage
+, pkgs
+, requests
+, numpy
+, graphviz
+, python
+, isPy3k
+, isPy310
+}:
+
+buildPythonPackage {
+  inherit (pkgs.mxnet) pname version src;
+
+  buildInputs = [ pkgs.mxnet ];
+  propagatedBuildInputs = [ requests numpy graphviz ];
+
+  LD_LIBRARY_PATH = lib.makeLibraryPath [ pkgs.mxnet ];
+
+  doCheck = !isPy3k;
+
+  postPatch = ''
+    substituteInPlace python/setup.py \
+      --replace "graphviz<0.9.0," "graphviz"
+  '';
+
+  preConfigure = ''
+    cd python
+  '';
+
+  postInstall = ''
+    rm -rf $out/mxnet
+    ln -s ${pkgs.mxnet}/lib/libmxnet.so $out/${python.sitePackages}/mxnet
+  '';
+
+  meta = pkgs.mxnet.meta // {
+    broken = (pkgs.mxnet.broken or false) || (isPy310 && pkgs.mxnet.cudaSupport);
+  };
+}