diff --git a/README.md b/README.md
index e59f8d7..bfedacd 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # libjxl
 
+JPEG XL image format reference implementation.
+
diff --git a/libjxl.spec b/libjxl.spec
new file mode 100644
index 0000000..022a994
--- /dev/null
+++ b/libjxl.spec
@@ -0,0 +1,154 @@
+Name:          libjxl
+Version:       0.7.0
+Release:       1mamba
+Summary:       JPEG XL image format reference implementation
+Group:         System/Libraries
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://github.com/libjxl/libjxl
+Source:        https://github.com/libjxl/libjxl.git/v%{version}/libjxl-%{version}.tar.bz2
+License:       BSD
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: libat-spi2-core-devel
+BuildRequires: libavif-devel
+BuildRequires: libbabl-devel
+BuildRequires: libbrotli-devel
+BuildRequires: libcairo-devel
+BuildRequires: libfontconfig-devel
+BuildRequires: libfreetype-devel
+BuildRequires: libgcc
+BuildRequires: libgdk-pixbuf-devel
+BuildRequires: libgegl-devel
+BuildRequires: libgif-devel
+BuildRequires: libgimp-devel
+BuildRequires: libglib-devel
+BuildRequires: libgperftools-devel
+BuildRequires: libgtk2-devel
+BuildRequires: libharfbuzz-devel
+BuildRequires: libhighway-devel
+BuildRequires: libimath-devel
+BuildRequires: libjpeg-devel
+BuildRequires: libjson-glib-devel
+BuildRequires: libopenexr-devel
+BuildRequires: libpango-devel
+BuildRequires: libpng-devel
+BuildRequires: libstdc++6-devel
+BuildRequires: libwebp-devel
+BuildRequires: libz-devel
+## AUTOBUILDREQ-END
+BuildRequires: cmake
+BuildRequires: asciidoc
+
+%description
+JPEG XL image format reference implementation.
+
+%package devel
+Group:         Development/Libraries
+Summary:       Development files for %{name}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      %{name}-tools = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      pkg-config
+
+%description devel
+This package contains libraries and header files for developing applications that use %{name}.
+
+%package tools
+Group:         Applications/Graphics
+Summary:       Utility applications for %{name}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
+
+%description tools
+This package contains utility applications for %{name}.
+
+%package gimp
+Group:         System/Libraries
+Summary:       GIMP plugin for %{name}
+Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
+
+%description gimp
+This package contains the GIMP plugin for %{name}.
+
+%package -n java-jxl
+Group:         System/Libraries/Java
+Summary:       Java jpegxl library
+
+%description -n java-jxl
+This package contains the Java jpegxl library.
+
+%debug_package
+
+%prep
+%setup -q
+
+%build
+%cmake -d build \
+   -DPython3_EXECUTABLE=%{__python3} \
+   -DJPEGXL_ENABLE_PLUGINS=true \
+   -DJPEGXL_FORCE_SYSTEM_BROTLI=true \
+   -DJPEGXL_FORCE_SYSTEM_GTEST=true \
+   -DJPEGXL_FORCE_SYSTEM_HWY=true \
+   -DJPEGXL_BUNDLE_LIBPNG=NO \
+   -DJPEGXL_INSTALL_JARDIR=%{_javadir} \
+%ifarch arm
+   -DCMAKE_CXX_FLAGS="%{optflags} -march=armv5te -mfloat-abi=softfp -latomic"
+%endif
+
+%make
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%makeinstall -C build
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%post -p /sbin/ldconfig
+%postun -p /sbin/ldconfig
+
+%files
+%defattr(-,root,root)
+%{_libdir}/libjxl.so.*
+%{_libdir}/libjxl_threads.so.*
+%{_libdir}/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-jxl.so
+%doc AUTHORS LICENSE
+
+%files devel
+%defattr(-,root,root)
+%dir %{_includedir}/jxl
+%{_includedir}/jxl/*
+%{_libdir}/libjxl.a
+%{_libdir}/libjxl.so
+%{_libdir}/libjxl_dec.a
+%{_libdir}/libjxl_jni.so
+%{_libdir}/libjxl_threads.a
+%{_libdir}/libjxl_threads.so
+%{_libdir}/pkgconfig/libjxl.pc
+%{_libdir}/pkgconfig/libjxl_threads.pc
+%{_datadir}/mime/packages/image-jxl.xml
+%{_datadir}/thumbnailers/jxl.thumbnailer
+
+%doc README.Haiku.md README.OSX.md README.md
+
+%files tools
+%defattr(-,root,root)
+%{_bindir}/benchmark_xl
+%{_bindir}/cjpeg_hdr
+%{_bindir}/cjxl
+%{_bindir}/djxl
+%{_bindir}/jxlinfo
+%{_mandir}/man1/cjxl.1*
+%{_mandir}/man1/djxl.1*
+
+%files gimp
+%defattr(-,root,root)
+%{_libdir}/gimp/2.0/plug-ins/file-jxl/file-jxl
+
+%files -n java-jxl
+%defattr(-,root,root)
+%{_datadir}/java/org.jpeg.jpegxl.jar
+
+%changelog
+* Wed Jan 11 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 0.7.0-1mamba
+- package created using the webbuild interface