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/camlp5/default.nix

@@ -0,0 +1,46 @@
+{ lib, stdenv, fetchFromGitHub, ocaml, perl }:
+
+if lib.versionOlder ocaml.version "4.02"
+|| lib.versionOlder "4.13" ocaml.version
+then throw "camlp5 is not available for OCaml ${ocaml.version}"
+else
+
+stdenv.mkDerivation rec {
+
+  pname = "camlp5";
+  version = "7.14";
+
+  src = fetchFromGitHub {
+    owner = "camlp5";
+    repo = "camlp5";
+    rev = "rel${builtins.replaceStrings [ "." ] [ "" ] version}";
+    sha256 = "1dd68bisbpqn5lq2pslm582hxglcxnbkgfkwhdz67z4w9d5nvr7w";
+  };
+
+  buildInputs = [ ocaml perl ];
+
+  prefixKey = "-prefix ";
+
+  preConfigure = ''
+    configureFlagsArray=(--strict --libdir $out/lib/ocaml/${ocaml.version}/site-lib)
+    patchShebangs ./config/find_stuffversion.pl
+  '';
+
+  buildFlags = [ "world.opt" ];
+
+  dontStrip = true;
+
+  meta = with lib; {
+    description = "Preprocessor-pretty-printer for OCaml";
+    longDescription = ''
+      Camlp5 is a preprocessor and pretty-printer for OCaml programs.
+      It also provides parsing and printing tools.
+    '';
+    homepage = "https://camlp5.github.io/";
+    license = licenses.bsd3;
+    platforms = ocaml.meta.platforms or [];
+    maintainers = with maintainers; [
+      maggesi vbgl
+    ];
+  };
+}