diff --git a/ocaml-fileutils.changes b/ocaml-fileutils.changes
index 4f3a939..a78e411 100644
--- a/ocaml-fileutils.changes
+++ b/ocaml-fileutils.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon May 30 06:39:17 UTC 2016 - ohering@suse.de
+
+- Fix build with ocaml-4.03 (fate#320836)
+
 -------------------------------------------------------------------
 Tue Nov 10 10:18:47 UTC 2015 - ohering@suse.de
 
diff --git a/ocaml-fileutils.spec b/ocaml-fileutils.spec
index 8bf712d..610dcfe 100644
--- a/ocaml-fileutils.spec
+++ b/ocaml-fileutils.spec
@@ -18,8 +18,8 @@
 
 Name:           ocaml-fileutils
 Version:        0.5.0
-%{ocaml_preserve_bytecode}
 Release:        0
+%{ocaml_preserve_bytecode}
 Summary:        OCaml library for common file and filename operations
 License:        SUSE-LGPL-2.0-with-linking-exception
 Group:          Development/Libraries/Other
@@ -27,9 +27,8 @@ Url:            https://forge.ocamlcore.org/projects/ocaml-fileutils/
 Source0:        ocaml-fileutils-%{version}.tar.xz
 BuildRequires:  ocaml >= 4.00.1
 BuildRequires:  ocaml-rpm-macros >= 4.02.1
-BuildRequires:  ocamlfind(findlib)
 BuildRequires:  ocamlfind(str)
-BuildRequires:  ocaml-ocamlbuild
+BuildRequires:  ocaml-oasis
 BuildRequires:  ocaml-ocamldoc
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 # ocaml autodep start for pkg: ocaml-fileutils
@@ -63,24 +62,31 @@ developing applications that use %{name}.
 
 
 %build
-ocaml setup.ml -configure --prefix %{_prefix} --destdir %{buildroot}
-make %{?_smp_mflags}
+oasis setup
+ocaml setup.ml -configure \
+      --bindir '%{_bindir}' \
+      --mandir '%{_mandir}' \
+      --destdir '%{buildroot}' \
+      --datarootdir '%{_datadir}' \
+      --libdir '%{_libdir}' \
+      --libexecdir '%{_libexecdir}' \
+      --localstatedir '%{_localstatedir}' \
+      --sbindir '%{_sbindir}' \
+      --prefix '%{_prefix}' \
+      --sysconfdir '%{_sysconfdir}' \
+      --exec-prefix '%{_exec_prefix}' \
+      --sharedstatedir '%{_sharedstatedir}'
+ocaml setup.ml -build
 
 
 %install
-export DESTDIR=%{buildroot}
-export OCAMLFIND_DESTDIR=%{buildroot}%{_libdir}/ocaml
-mkdir -p $OCAMLFIND_DESTDIR $OCAMLFIND_DESTDIR/stublibs
-
-# Set htmldir to current directory, then copy the docs (in api/)
-# as a %doc rule.
-make htmldir=. install
+export OCAMLFIND_DESTDIR=%{buildroot}`ocamlc -where`
+mkdir -p $OCAMLFIND_DESTDIR
+ocaml setup.ml -install
 
 
 %check
-make %{?_smp_mflags} test
-
-
+ocaml setup.ml -test
 
 %files
 %defattr(-,root,root,-)
@@ -101,8 +107,11 @@ make %{?_smp_mflags} test
 %{_libdir}/ocaml/*/*.cmx
 %{_libdir}/ocaml/*/*.cmxa
 %endif
+%{_libdir}/ocaml/*/*.annot
 %{_libdir}/ocaml/*/*.cma
 %{_libdir}/ocaml/*/*.cmi
+%{_libdir}/ocaml/*/*.cmt
+%{_libdir}/ocaml/*/*.cmti
 %{_libdir}/ocaml/*/*.mli
 %{_libdir}/ocaml/*/*.ml
 %{_libdir}/ocaml/*/META