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/ocaml-modules/netchannel/default.nix

@@ -0,0 +1,55 @@
+{ lib
+, buildDunePackage
+, fetchurl
+, ppx_sexp_conv
+, ppx_cstruct
+, lwt
+, mirage-net
+, io-page
+, mirage-xen
+, ipaddr
+, mirage-profile
+, shared-memory-ring
+, sexplib
+, logs
+, rresult
+}:
+
+buildDunePackage rec {
+  pname = "netchannel";
+  version = "2.0.0";
+
+  useDune2 = true;
+
+  minimumOCamlVersion = "4.08";
+
+  src = fetchurl {
+    url = "https://github.com/mirage/mirage-net-xen/releases/download/v${version}/mirage-net-xen-v${version}.tbz";
+    sha256 = "ec3906ef1804ef6a9e36b91f4ae73ce4849e9e0d1d36a80fe66b5f905fab93ad";
+  };
+
+  nativeBuildInputs = [
+    ppx_cstruct
+  ];
+
+  propagatedBuildInputs = [
+    ppx_sexp_conv
+    lwt
+    mirage-net
+    io-page
+    mirage-xen
+    ipaddr
+    mirage-profile
+    shared-memory-ring
+    sexplib
+    logs
+    rresult
+  ];
+
+  meta = with lib; {
+    description = "Network device for reading and writing Ethernet frames via then Xen netfront/netback protocol";
+    license = licenses.isc;
+    maintainers = [ maintainers.sternenseemann ];
+    homepage = "https://github.com/mirage/mirage-net-xen";
+  };
+}