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/pcap-format/default.nix

@@ -0,0 +1,42 @@
+{ lib, buildDunePackage, fetchurl
+, ppx_cstruct, ppx_tools
+, cstruct, ounit, mmap, stdlib-shims
+}:
+
+buildDunePackage rec {
+  pname = "pcap-format";
+  version = "0.5.2";
+
+  minimumOCamlVersion = "4.03";
+
+  # due to cstruct
+  useDune2 = true;
+
+  src = fetchurl {
+    url = "https://github.com/mirage/ocaml-pcap/releases/download/${version}/${pname}-${version}.tbz";
+    sha256 = "14c5rpgglyz41jic0fg0xa22d2w1syb86kva22y9fi7aqj9vm31f";
+  };
+
+  nativeBuildInputs = [
+    ppx_tools
+    ppx_cstruct
+  ];
+
+  propagatedBuildInputs = [
+    cstruct
+    stdlib-shims
+  ];
+
+  doCheck = true;
+  checkInputs = [
+    ounit
+    mmap
+  ];
+
+  meta = with lib; {
+    description = "Decode and encode PCAP (packet capture) files";
+    homepage = "https://mirage.github.io/ocaml-pcap";
+    license = licenses.isc;
+    maintainers = [ maintainers.sternenseemann ];
+  };
+}