ocaml-oasis: adds missing dependency to caml4

pkgs/development/tools/ocaml/oasis/default.nix

@@ -1,4 +1,4 @@
-{stdenv, fetchurl, ocaml, findlib, ocaml_data_notation, ocaml_typeconv,
+{stdenv, fetchurl, ocaml, findlib, ocaml_data_notation, ocaml_typeconv, camlp4,
  ocamlmod, ocamlify, ounit, expect}:
 
 stdenv.mkDerivation {
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
 
   buildInputs =
     [
-      ocaml findlib ocaml_typeconv ocamlmod ocamlify ounit
+      ocaml findlib ocaml_typeconv ocamlmod ocamlify ounit camlp4
     ];
 
   propagatedBuildInputs = [ ocaml_data_notation ];
@@ -22,13 +22,13 @@ stdenv.mkDerivation {
   buildPhase     = "ocaml setup.ml -build";
   installPhase   = "ocaml setup.ml -install";
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://oasis.forge.ocamlcore.org/;
     description = "Configure, build and install system for OCaml projects";
-    license = stdenv.lib.licenses.lgpl21;
+    license = licenses.lgpl21;
     platforms = ocaml.meta.platforms;
-    maintainers = with stdenv.lib.maintainers; [
-      z77z
+    maintainers = with maintainers; [
+      vbgl z77z
     ];
   };
 }