diff --git a/pkgs/development/tools/ocaml/js_of_ocaml/default.nix b/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
index 33a7fe52c394..d88dd9eb8964 100644
--- a/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
+++ b/pkgs/development/tools/ocaml/js_of_ocaml/default.nix
@@ -1,16 +1,26 @@
-{ stdenv, fetchurl, ocaml, findlib, ocaml_lwt, menhir, ocsigen_deriving, ppx_deriving, camlp4,
- cmdliner, tyxml, reactivedata, cppo, which, base64}:
+{ stdenv, fetchurl, ocaml, findlib, ocaml_lwt, menhir, ocsigen_deriving, ppx_deriving, camlp4
+, cmdliner, tyxml, reactivedata, cppo, which, base64, uchar
+}:
+
+let version = if stdenv.lib.versionAtLeast ocaml.version "4.02"
+  then "2.8.3" else "2.7";
+in
 
 stdenv.mkDerivation {
-  name = "js_of_ocaml-2.7";
+  name = "js_of_ocaml-${version}";
   src = fetchurl {
-    url = https://github.com/ocsigen/js_of_ocaml/archive/2.7.tar.gz;
-    sha256 = "1dali1akyd4zmkwav0d957ynxq2jj6cc94r4xiaql7ca89ajz4jj";
-    };
+    url = "https://github.com/ocsigen/js_of_ocaml/archive/${version}.tar.gz";
+    sha256 = {
+      "2.7" = "1dali1akyd4zmkwav0d957ynxq2jj6cc94r4xiaql7ca89ajz4jj";
+      "2.8.3" = "0xrw215w5saqdcdd9ipjhvg8f982z63znsds9ih445s3jr49szm7";
+    }."${version}";
+  };
 
   buildInputs = [ ocaml findlib menhir ocsigen_deriving
-                 cmdliner tyxml reactivedata cppo which base64];
-  propagatedBuildInputs = [ ocaml_lwt camlp4 ppx_deriving ];
+                 cmdliner reactivedata cppo which base64 ]
+  ++ stdenv.lib.optional (stdenv.lib.versionAtLeast ocaml.version "4.02") tyxml;
+  propagatedBuildInputs = [ ocaml_lwt camlp4 ppx_deriving ]
+  ++ stdenv.lib.optional (version == "2.8.3") uchar;
 
   patches = [ ./Makefile.conf.diff ];