diff --git a/README.md b/README.md
index cc34125..3699413 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,5 @@
 # ghc-bin
 
+Glasgow Haskell Compiler version able to bootstrap GHC from sources.
+It is only needed the first time to bootstrap the ghc package.
+
diff --git a/ghc-bin.spec b/ghc-bin.spec
new file mode 100644
index 0000000..cb42d30
--- /dev/null
+++ b/ghc-bin.spec
@@ -0,0 +1,95 @@
+%define _prefix /opt/ghc
+Name:          ghc-bin
+Version:       9.0.2
+Release:       1mamba
+Summary:       Glasgow Haskell Compiler version used to bootstrap GHC from sources
+Group:         Applications/Development
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://www.haskell.org/ghc/
+Source0:       https://downloads.haskell.org/~ghc/%{version}/ghc-%{version}a-i386-deb9-linux.tar.xz
+Source1:       https://downloads.haskell.org/~ghc/%{version}/ghc-%{version}-x86_64-deb10-linux.tar.xz
+Source2:       https://downloads.haskell.org/~ghc/%{version}/ghc-%{version}-aarch64-deb10-linux.tar.xz
+License:       BSD
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: libffi-devel
+BuildRequires: libgmp-devel
+BuildRequires: libncurses-devel
+BuildRequires: libnuma-devel
+## AUTOBUILDREQ-END
+Provides:      ghc-bootstrap-compiler
+Obsoletes:     ghc-bootstrap-compiler < 9
+#BuildRequires: libgmp3
+
+%description
+Glasgow Haskell Compiler version able to bootstrap GHC from sources.
+It is only needed the first time to bootstrap the ghc package.
+
+%ifnarch aarch64
+%debug_package
+%endif
+
+%prep
+%setup -q -c -T
+%global __provides_exclude_from ^.*$
+%global __requires_exclude ^.*libHS.*|libtinfo.so.6*$
+
+%ifarch %{ix86}
+tar xf %{SOURCE0}
+%endif
+
+%ifarch x86_64
+tar xf %{SOURCE1}
+%endif
+
+%ifarch aarch64
+tar xf %{SOURCE2}
+%endif
+
+mv ghc-%{version}*/* .
+
+%build
+./configure \
+   --prefix=%{_prefix}
+   
+#   \
+#   --libdir=%{_libdir}
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%makeinstall
+
+rm -rf %{buildroot}%{_datadir}/doc/ghc
+rm -f %{buildroot}%{_mandir}/man1/ghc.1*
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%files
+%defattr(-,root,root)
+%{_bindir}/*
+%dir %{_prefix}/lib/ghc-%{version}
+%{_prefix}/lib/ghc-%{version}/*
+%dir %{_datadir}/doc/ghc-%{version}
+%dir %{_datadir}/doc/ghc-%{version}/html
+%{_datadir}/doc/ghc-%{version}/html/*
+%{_datadir}/doc/ghc-%{version}/*.pdf
+#%dir %{_datadir}/doc/ghc-%{version}/archives
+#%{_datadir}/doc/ghc-9.4.8/archives/*
+#%dir %{_datadir}/doc/ghc-%{version}/users_guide
+#%dir %{_datadir}/doc/ghc-%{version}/users_guide/build-man
+#%{_datadir}/doc/ghc-%{version}/users_guide/build-man/ghc.1
+%{_datadir}/man/man1/ghc.1*
+#%doc LICENSE
+
+%changelog
+* Sat Nov 11 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 9.0.2-1mamba
+- update to 9.0.2
+
+* Sat Feb 12 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 8.10.7-1mamba
+- update to 8.10.7
+
+* Sat Sep 07 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 7.6.3-1mamba
+- package created by silvan using the webbuild interface