diff --git a/_service b/_service
index 2ba8c03..6c8f2a3 100644
--- a/_service
+++ b/_service
@@ -1,7 +1,7 @@
 <services>
   <service name="tar_scm" mode="disabled">
     <param name="filename">ocaml-pyml</param>
-    <param name="revision">b6608db88f0559f7e59b9be859a649f5bb6812b7</param>
+    <param name="revision">5c61e0e898a9a6a2794d9c3e26484650f8c1dec6</param>
     <param name="scm">git</param>
     <param name="submodules">disable</param>
     <param name="url">https://github.com/thierry-martinez/pyml.git</param>
diff --git a/ocaml-pyml-20210226.tar.xz b/ocaml-pyml-20210226.tar.xz
deleted file mode 100644
index 789086f..0000000
--- a/ocaml-pyml-20210226.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:688e415142f6463d48ecbede0887863bb843b766d15afe173ad9ceabb21450f5
-size 67572
diff --git a/ocaml-pyml-20210924.tar.xz b/ocaml-pyml-20210924.tar.xz
new file mode 100644
index 0000000..09504f6
--- /dev/null
+++ b/ocaml-pyml-20210924.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c4064515e7b8ab300433c61f20af7703d3fffd587bff084a632a7f490574b3a9
+size 69236
diff --git a/ocaml-pyml.changes b/ocaml-pyml.changes
index 0514de9..e6d38a0 100644
--- a/ocaml-pyml.changes
+++ b/ocaml-pyml.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sat Sep 11 12:34:56 UTC 2021 - ohering@suse.de
+
+- Update to version 20210924
+  build with dune
+
 -------------------------------------------------------------------
 Tue Jun 15 15:15:15 UTC 2021 - ohering@suse.de
 
diff --git a/ocaml-pyml.spec b/ocaml-pyml.spec
index c70857b..b25885a 100644
--- a/ocaml-pyml.spec
+++ b/ocaml-pyml.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package ocaml-pyml
 #
-# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2021 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -16,7 +16,7 @@
 #
 
 Name:           ocaml-pyml
-Version:        20210226
+Version:        20210924
 Release:        0
 %{?ocaml_preserve_bytecode}
 Summary:        Stdcompat: compatibility module for OCaml standard library 
@@ -25,10 +25,9 @@ Group:          Development/Languages/OCaml
 URL:            https://opam.ocaml.org/packages/pyml
 Source0:        %{name}-%{version}.tar.xz
 BuildRequires:  ocaml
-#uildRequires:  ocaml-dune
-BuildRequires:  ocaml-rpm-macros >= 20210409
+BuildRequires:  ocaml-dune
+BuildRequires:  ocaml-rpm-macros >= 20210911
 BuildRequires:  ocamlfind(bigarray)
-BuildRequires:  ocamlfind(findlib)
 BuildRequires:  ocamlfind(stdcompat)
 BuildRequires:  ocamlfind(unix)
 # make check
@@ -56,33 +55,17 @@ developing applications that use %{name}.
 %autosetup -p1
 
 %build
-sed -i~ '
-s@^\(HAVE_OCAMLFIND := $(shell \).*@\1 set -x ; \\@
-s@2>&1@@g
-' Makefile
-diff -u "$_"~ "$_" && exit 1
-%make_build
-%if 0
+ocamlc -config
 dune_release_pkgs='pyml'
 %ocaml_dune_setup
 %ocaml_dune_build
-%endif
 
 %install
-mkdir -vp '%{buildroot}%{ocaml_standard_library}'
-export OCAMLFIND_DESTDIR='%{buildroot}%{ocaml_standard_library}'
-export OCAMLFIND_LDCONF='ignore'
-%make_install STDCOMPAT="$(ocamlfind query stdcompat)"
-%ocaml_create_file_list
-%if 0
 %ocaml_dune_install
 %ocaml_create_file_list
-%endif
 
 %check
-%if 0
 %ocaml_dune_test
-%endif
 
 %files -f %{name}.files