diff --git a/README.md b/README.md
index 604546d..176af30 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # immer
 
+Postmodern immutable and persistent data structures for C++ — value semantics at scale.
+
diff --git a/immer.spec b/immer.spec
new file mode 100644
index 0000000..4d00708
--- /dev/null
+++ b/immer.spec
@@ -0,0 +1,51 @@
+Name:          immer
+Version:       0.8.1
+Release:       1mamba
+Summary:       Postmodern immutable and persistent data structures for C++ — value semantics at scale
+Group:         System/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://sinusoid.es/immer
+Source:        https://github.com/arximboldi/immer.git/v%{version}/immer-%{version}.tar.bz2
+License:       BSL-1.0
+## AUTOBUILDREQ-BEGIN
+## AUTOBUILDREQ-END
+BuildRequires: cmake
+
+%description
+Postmodern immutable and persistent data structures for C++ — value semantics at scale.
+
+%package devel
+Group:         Development/Libraries
+Summary:       Postmodern immutable and persistent data structures for C++ — value semantics at scale.
+
+%description devel
+Postmodern immutable and persistent data structures for C++ — value semantics at scale.
+This package contains libraries and header files for developing applications that use %{name}.
+
+%prep
+%setup -q
+
+%build
+%cmake
+%cmake_build
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%cmake_install
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%files devel
+%defattr(-,root,root)
+%dir %{_includedir}/immer
+%{_includedir}/immer/*
+%dir %{_libdir}/cmake/Immer
+%{_libdir}/cmake/Immer/Immer*.cmake
+%doc LICENSE README.rst
+
+%changelog
+* Mon Feb 05 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 0.8.1-1mamba
+- package created using the webbuild interface