diff --git a/README.md b/README.md
index 52031b6..dbdf0ef 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,3 @@
 
 A composable build system for OCaml.
 
-
diff --git a/dune.spec b/dune.spec
index 11a313b..d649048 100644
--- a/dune.spec
+++ b/dune.spec
@@ -1,6 +1,6 @@
 Name:          dune
 Version:       2.8.5
-Release:       1mamba
+Release:       2mamba
 Summary:       A composable build system for OCaml
 Group:         Development/Tools
 Vendor:        openmamba
@@ -11,29 +11,34 @@ Source:        https://github.com/ocaml/dune.git/%{version}/dune-%{version}.tar.
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
+BuildRequires: ocaml
+BuildRequires: ocaml-csexp
 BuildRequires: ocaml-runtime
 ## AUTOBUILDREQ-END
 BuildRequires: ocaml >= 4.11.1
+BuildRequires: ocaml-findlib
 
 %description
 A composable build system for OCaml.
 
-
 %debug_package
 
 %prep
 %setup -q
 
 %build
-./configure \
-   --libdir=%{_libdir}/ocaml \
-   --mandir=%{_mandir} \
-   
-%make release
+dune_release_pkgs='dune,dune-action-plugin,dune-build-info,dune-configurator,dune-glob,dune-private-libs,dune-site'
+make dune.exe
+./dune.exe build -p $dune_release_pkgs --profile dune-bootstrap
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
-%makeinstall
+
+./dune.exe install \
+   --destdir=%{buildroot} \
+   --prefix=%{_prefix} \
+   --mandir=%{_mandir} \
+   --libdir=$(ocamlfind printconf destdir)
  
 mv %{buildroot}%{_prefix}/doc %{buildroot}%{_datadir}
 
@@ -49,12 +54,45 @@ mv %{buildroot}%{_prefix}/doc %{buildroot}%{_datadir}
 %{_datadir}/emacs/site-lisp/dune.el
 %dir %{_libdir}/ocaml/dune
 %{_libdir}/ocaml/dune/*
+%dir %{_libdir}/ocaml/dune-action-plugin
+%{_libdir}/ocaml/dune-action-plugin/*
+%dir %{_libdir}/ocaml/dune-build-info
+%{_libdir}/ocaml/dune-build-info/*
+#%dir %{_libdir}/ocaml/dune-build
+#%{_libdir}/ocaml/dune-build/*
+%dir %{_libdir}/ocaml/dune-configurator
+%{_libdir}/ocaml/dune-configurator/*
+%dir %{_libdir}/ocaml/dune-configurator/.private
+%{_libdir}/ocaml/dune-configurator/.private/*
+%dir %{_libdir}/ocaml/dune-glob
+%{_libdir}/ocaml/dune-glob/*
+%dir %{_libdir}/ocaml/dune-private-libs
+%{_libdir}/ocaml/dune-private-libs/*
+%dir %{_libdir}/ocaml/dune-site
+%{_libdir}/ocaml/dune-site/*
+%dir %{_libdir}/ocaml/stublibs
+%{_libdir}/ocaml/stublibs/*.so
 %dir %{_docdir}/dune
 %{_docdir}/dune/*
 %{_mandir}/man1/dune*.1*
 %{_mandir}/man5/dune-config.5*
+%dir %{_docdir}/dune-action-plugin
+%{_docdir}/dune-action-plugin/*
+%dir %{_docdir}/dune-build-info
+%{_docdir}/dune-build-info/*
+%dir %{_docdir}/dune-configurator
+%{_docdir}/dune-configurator/*
+%dir %{_docdir}/dune-glob
+%{_docdir}/dune-glob/*
+%dir %{_docdir}/dune-private-libs
+%{_docdir}/dune-private-libs/*
+%dir %{_docdir}/dune-site
+%{_docdir}/dune-site/*
 
 %changelog
+* Tue May 04 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 2.8.5-2mamba
+- rebuilt providing a list of required release pkgs
+
 * Tue Mar 30 2021 Automatic Build System <autodist@mambasoft.it> 2.8.5-1mamba
 - automatic version update by autodist