diff --git a/pkgs/development/tools/ocaml/findlib/default.nix b/pkgs/development/tools/ocaml/findlib/default.nix
index 18b84e2c961..91870a570b0 100644
--- a/pkgs/development/tools/ocaml/findlib/default.nix
+++ b/pkgs/development/tools/ocaml/findlib/default.nix
@@ -1,33 +1,17 @@
 { 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}";
-  inherit (param) version;
+  version = "1.8.1";
 
   src = fetchurl {
     url = "http://download.camlcity.org/download/findlib-${version}.tar.gz";
-    inherit (param) sha256;
+    sha256 = "00s3sfb02pnjmkax25pcnljcnhcggiliccfz69a72ic7gsjwz1cf";
   };
 
   buildInputs = [m4 ncurses ocaml];
 
-  patches = [ ./ldconf.patch ./install_topfind.patch ]
-  ++ (param.patches or []);
+  patches = [ ./ldconf.patch ./install_topfind.patch ];
 
   dontAddPrefix=true;
 
diff --git a/pkgs/development/tools/ocaml/findlib/install_topfind.patch b/pkgs/development/tools/ocaml/findlib/install_topfind.patch
index 7cd32991d0e..dbdb0edd6cb 100644
--- a/pkgs/development/tools/ocaml/findlib/install_topfind.patch
+++ b/pkgs/development/tools/ocaml/findlib/install_topfind.patch
@@ -6,7 +6,7 @@
  	mkdir -p "$(prefix)$(OCAMLFIND_BIN)"
 -	test $(INSTALL_TOPFIND) -eq 0 || cp topfind "$(prefix)$(OCAML_CORE_STDLIB)"
 +	test $(INSTALL_TOPFIND) -eq 0 || cp topfind "$(prefix)$(OCAML_SITELIB)"
-	files=`$(SH) $(TOP)/tools/collect_files $(TOP)/Makefile.config findlib.cmi findlib.mli findlib.cma findlib.cmxa findlib.a findlib.cmxs topfind.cmi topfind.mli fl_package_base.mli fl_package_base.cmi fl_metascanner.mli fl_metascanner.cmi fl_metatoken.cmi findlib_top.cma findlib_top.cmxa findlib_top.a findlib_top.cmxs findlib_dynload.cma findlib_dynload.cmxa findlib_dynload.a findlib_dynload.cmxs fl_dynload.mli fl_dynload.cmi META` && \
+	files=`$(SH) $(TOP)/tools/collect_files $(TOP)/Makefile.config findlib.cmi findlib.mli findlib.cma findlib.cmxa findlib$(LIB_SUFFIX) findlib.cmxs topfind.cmi topfind.mli fl_package_base.mli fl_package_base.cmi fl_metascanner.mli fl_metascanner.cmi fl_metatoken.cmi findlib_top.cma findlib_top.cmxa findlib_top$(LIB_SUFFIX) findlib_top.cmxs findlib_dynload.cma findlib_dynload.cmxa findlib_dynload$(LIB_SUFFIX) findlib_dynload.cmxs fl_dynload.mli fl_dynload.cmi META` && \
 	cp $$files "$(prefix)$(OCAML_SITELIB)/$(NAME)"
 	f="ocamlfind$(EXEC_SUFFIX)"; { test -f ocamlfind_opt$(EXEC_SUFFIX) && f="ocamlfind_opt$(EXEC_SUFFIX)"; }; \