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-nat/default.nix

@@ -0,0 +1,50 @@
+{ lib, buildDunePackage, fetchurl
+, ipaddr, cstruct, lwt, logs, lru
+, tcpip, ethernet, stdlib-shims
+, alcotest, mirage-clock-unix
+, ppxlib, ppx_deriving
+}:
+
+buildDunePackage rec {
+  pname = "mirage-nat";
+  version = "2.2.5";
+
+  minimumOCamlVersion = "4.08";
+
+  # due to cstruct
+  useDune2 = true;
+
+  src = fetchurl {
+    url = "https://github.com/mirage/${pname}/releases/download/v${version}/${pname}-v${version}.tbz";
+    sha256 = "01xp0z4mywhawz7rxizi9ph342mqqwyfa5hqgvs8lhqzcym5d104";
+  };
+
+  buildInputs = [
+    ppxlib
+  ];
+
+  propagatedBuildInputs = [
+    ipaddr
+    cstruct
+    lwt
+    logs
+    lru
+    tcpip
+    ethernet
+    stdlib-shims
+    ppx_deriving
+  ];
+
+  doCheck = true;
+  checkInputs = [
+    alcotest
+    mirage-clock-unix
+  ];
+
+  meta = with lib; {
+    description = "Mirage-nat is a library for network address translation to be used with MirageOS";
+    homepage = "https://github.com/mirage/${pname}";
+    license = licenses.isc;
+    maintainers = [ maintainers.sternenseemann ];
+  };
+}