diff --git a/pkgs/development/tools/ocaml/findlib/default.nix b/pkgs/development/tools/ocaml/findlib/default.nix
index 6f136a7ef289..e25b94714b68 100644
--- a/pkgs/development/tools/ocaml/findlib/default.nix
+++ b/pkgs/development/tools/ocaml/findlib/default.nix
@@ -1,22 +1,33 @@
 { stdenv, fetchurl, fetchpatch, m4, ncurses, ocaml, writeText }:
 
+let param =
+  if stdenv.lib.versionAtLeast ocaml.version "4"
+  then {
+    version = "1.8.0";
+    sha256 = "1b97zqjdriqd2ikgh4rmqajgxwdwn013riji5j53y3xvcmnpsyrb";
+  } else {
+    version = "1.7.3";
+    sha256 = "12xx8si1qv3xz90qsrpazjjk4lc1989fzm97rsmc4diwla7n15ni";
+    patches = [ (fetchpatch {
+      url = "https://raw.githubusercontent.com/ocaml/opam-repository/1f29c5ef8eccd373e5ff2169a30bfd95a9ae6050/packages/ocamlfind/ocamlfind.1.7.3-1/files/threads.patch";
+      sha256 = "0cqgpjqpmfbr0ph3jr25gw8hgckj4qlfwmir6vkgi5hvn2qnjpx3";
+    }) ];
+  };
+in
+
 stdenv.mkDerivation rec {
   name = "ocaml-findlib-${version}";
-  version = "1.7.3";
+  inherit (param) version;
 
   src = fetchurl {
     url = "http://download.camlcity.org/download/findlib-${version}.tar.gz";
-    sha256 = "12xx8si1qv3xz90qsrpazjjk4lc1989fzm97rsmc4diwla7n15ni";
+    inherit (param) sha256;
   };
 
   buildInputs = [m4 ncurses ocaml];
 
-  patches = [ ./ldconf.patch ./install_topfind.patch
-    (fetchpatch {
-      url = "https://raw.githubusercontent.com/ocaml/opam-repository/1f29c5ef8eccd373e5ff2169a30bfd95a9ae6050/packages/ocamlfind/ocamlfind.1.7.3-1/files/threads.patch";
-      sha256 = "0cqgpjqpmfbr0ph3jr25gw8hgckj4qlfwmir6vkgi5hvn2qnjpx3";
-    })
-  ];
+  patches = [ ./ldconf.patch ./install_topfind.patch ]
+  ++ (param.patches or []);
 
   dontAddPrefix=true;