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/tools/ocaml/ocamlmod/default.nix

@@ -0,0 +1,39 @@
+{ lib, stdenv, fetchurl, ocaml, findlib, ocamlbuild, ounit }:
+
+let
+  # ounit is only available for OCaml >= 4.04
+  doCheck = lib.versionAtLeast ocaml.version "4.04";
+in
+
+stdenv.mkDerivation {
+  pname = "ocamlmod";
+  version = "0.0.9";
+
+  src = fetchurl {
+    url = "https://forge.ocamlcore.org/frs/download.php/1702/ocamlmod-0.0.9.tar.gz";
+    sha256 = "0cgp9qqrq7ayyhddrmqmq1affvfqcn722qiakjq4dkywvp67h4aa";
+  };
+
+  buildInputs = [ ocaml findlib ocamlbuild ];
+
+  configurePhase = "ocaml setup.ml -configure --prefix $out"
+    + lib.optionalString doCheck " --enable-tests";
+  buildPhase     = "ocaml setup.ml -build";
+  installPhase   = "ocaml setup.ml -install";
+
+  inherit doCheck;
+  checkInputs = [ ounit ];
+
+  checkPhase = "ocaml setup.ml -test";
+
+  dontStrip = true;
+
+  meta = {
+    homepage = "https://forge.ocamlcore.org/projects/ocamlmod/ocamlmod";
+    description = "Generate OCaml modules from source files";
+    platforms = ocaml.meta.platforms or [];
+    maintainers = with lib.maintainers; [
+      maggesi
+    ];
+  };
+}