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/hmap/default.nix

@@ -0,0 +1,44 @@
+{ stdenv
+, lib
+, fetchurl
+, findlib
+, ocaml
+, ocamlbuild
+, topkg
+}:
+
+let
+  minimumSupportedOcamlVersion = "4.02.0";
+in
+assert lib.versionOlder minimumSupportedOcamlVersion ocaml.version;
+
+stdenv.mkDerivation rec {
+  pname = "hmap";
+  version = "0.8.1";
+  name = "ocaml${ocaml.version}-${pname}-${version}";
+
+  src = fetchurl {
+    url = "http://erratique.ch/software/hmap/releases/${pname}-${version}.tbz";
+    sha256 = "10xyjy4ab87z7jnghy0wnla9wrmazgyhdwhr4hdmxxdn28dxn03a";
+  };
+
+  nativeBuildInputs = [ ocaml ocamlbuild findlib topkg ];
+  buildInputs = [ topkg ];
+
+  strictDeps = true;
+
+  inherit (topkg) installPhase;
+
+  buildPhase = "${topkg.run} build --tests true";
+
+  doCheck = true;
+
+  checkPhase = "${topkg.run} test";
+
+  meta = {
+    description = "Heterogeneous value maps for OCaml";
+    homepage = "https://erratique.ch/software/hmap";
+    license = lib.licenses.isc;
+    maintainers = [ lib.maintainers.pmahoney ];
+  };
+}