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/mirage-vnetif/default.nix

@@ -0,0 +1,40 @@
+{ lib, buildDunePackage, fetchurl
+, lwt, mirage-time, mirage-clock, mirage-net
+, cstruct, ipaddr, macaddr, mirage-profile
+, duration, logs
+}:
+
+buildDunePackage rec {
+  pname = "mirage-vnetif";
+  version = "0.5.0";
+
+  minimumOCamlVersion = "4.06";
+
+  # due to cstruct
+  useDune2 = true;
+
+  src = fetchurl {
+    url = "https://github.com/mirage/${pname}/releases/download/v${version}/${pname}-v${version}.tbz";
+    sha256 = "0cpqwf51v2cpz41dfqxabf3bsabwyl6a0h0v2ncrn33q58i60m5q";
+  };
+
+  propagatedBuildInputs = [
+    lwt
+    mirage-net
+    mirage-time
+    mirage-clock
+    cstruct
+    ipaddr
+    macaddr
+    mirage-profile
+    duration
+    logs
+  ];
+
+  meta = with lib; {
+    description = "Virtual network interface and software switch for Mirage";
+    homepage = "https://github.com/mirage/${pname}";
+    license = licenses.isc;
+    maintainers = [ maintainers.sternenseemann ];
+  };
+}