diff --git a/README.md b/README.md
index 9a6409d..89fb948 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,10 @@
 # solvespace
 
+A parametric 3d CAD program. Applications include:
+modeling 3d parts — draw with extrudes, revolves, and Boolean (union / difference) operations
+modeling 2d parts — draw the part as a single section, and export DXF, PDF, SVG; use 3d assembly to verify fit
+3d-printed parts — export the STL or other triangle mesh expected by most 3d printers
+preparing CAM data — export 2d vector art for a waterjet machine or laser cutter; or generate STEP or STL, for import into third-party CAM software for machining
+mechanism design — use the constraint solver to simulate planar or spatial linkages, with pin, ball, or slide joints
+plane and solid geometry — replace hand-solved trigonometry and spreadsheets with a live dimensioned drawing
+
diff --git a/solvespace-v2.1-GetGitCommitHash.patch b/solvespace-v2.1-GetGitCommitHash.patch
new file mode 100644
index 0000000..3db16d6
--- /dev/null
+++ b/solvespace-v2.1-GetGitCommitHash.patch
@@ -0,0 +1,17 @@
+diff -Naur solvespace-2.x.orig/cmake/GetGitCommitHash.cmake solvespace-2.x/cmake/GetGitCommitHash.cmake
+--- solvespace-2.x.orig/cmake/GetGitCommitHash.cmake    2016-07-12 22:51:03.176211103 +0200
++++ solvespace-2.x/cmake/GetGitCommitHash.cmake 2016-07-12 22:51:43.072113111 +0200
+@@ -25,11 +25,11 @@
+     endif()
+     set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${GIT_DEPENDS})
+
+-    string(STRIP ${HEAD_REF} HEAD_REF)
++    string(STRIP "${HEAD_REF}" HEAD_REF)
+     if(HEAD_REF STREQUAL "")
+         message(WARNING "Cannot determine git HEAD")
+     else()
+-        set(GIT_COMMIT_HASH ${HEAD_REF} PARENT_SCOPE)
++        set(GIT_COMMIT_HASH "${HEAD_REF}" PARENT_SCOPE)
+     endif()
+ endfunction()
+ get_git_commit_hash()
\ No newline at end of file
diff --git a/solvespace.spec b/solvespace.spec
new file mode 100644
index 0000000..2f42293
--- /dev/null
+++ b/solvespace.spec
@@ -0,0 +1,106 @@
+Name:          solvespace
+Version:       2.3
+Release:       1mamba
+Summary:       A parametric 3d CAD program
+Group:         Graphical Desktop/Applications/Graphics
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Ercole 'ercolinux' Carpanetto <ercole69@gmail.com>
+URL:           http://solvespace.com/index.pl
+Source:        https://github.com/solvespace/solvespace.git/v%{version}/solvespace-%{version}.tar.bz2
+Patch0:        solvespace-v2.1-GetGitCommitHash.patch
+License:       GPL
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: libGL-devel
+BuildRequires: libGLU-devel
+BuildRequires: libX11-devel
+BuildRequires: libatkmm-devel
+BuildRequires: libcairomm-devel
+BuildRequires: libfontconfig-devel
+BuildRequires: libfreetype-devel
+BuildRequires: libgcc
+BuildRequires: libglew-devel
+BuildRequires: libglib-devel
+BuildRequires: libglibmm-devel
+BuildRequires: libgtk2-devel
+BuildRequires: libgtkmm2-devel
+BuildRequires: libjson-c-devel
+BuildRequires: libpangomm-devel
+BuildRequires: libpng-devel
+BuildRequires: libsigc++-devel
+BuildRequires: libspnav-devel
+BuildRequires: libstdc++6-devel
+BuildRequires: libz-devel
+## AUTOBUILDREQ-END
+BuildRequires: cmake
+Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+
+%description
+A parametric 3d CAD program. Applications include:
+modeling 3d parts — draw with extrudes, revolves, and Boolean (union / difference) operations
+modeling 2d parts — draw the part as a single section, and export DXF, PDF, SVG; use 3d assembly to verify fit
+3d-printed parts — export the STL or other triangle mesh expected by most 3d printers
+preparing CAM data — export 2d vector art for a waterjet machine or laser cutter; or generate STEP or STL, for import into third-party CAM software for machining
+mechanism design — use the constraint solver to simulate planar or spatial linkages, with pin, ball, or slide joints
+plane and solid geometry — replace hand-solved trigonometry and spreadsheets with a live dimensioned drawing
+
+%package -n lib%{name}
+Group:		   System/Libraries
+Summary:       Shared libraries for %{name}
+
+%description -n lib%{name}
+This package contains shared libraries for %{name}.
+
+%package -n lib%{name}-devel
+Group:         Development/Libraries
+Summary:       Development files for %{name}
+
+%description -n lib%{name}-devel
+This package contains libraries and header files for developing applications that use %{name}.
+
+%debug_package
+
+%prep
+%setup -q
+sed -i "s|^\(include.GetGitCommitHash.\)|#\1|" CMakeLists.txt
+sed -i'' -e's/CHAR_WIDTH/CHAR_WIDTH_/g' src/ui.h src/textwin.cpp src/toolbar.cpp
+
+%build
+%cmake -d build
+
+%make
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+%makeinstall -C build
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%files
+%defattr(-,root,root)
+%{_bindir}/solvespace
+%{_datadir}/applications/solvespace.desktop
+%{_datadir}/icons/hicolor/*/apps/solvespace.png
+%{_datadir}/icons/hicolor/*/mimetypes/application.x-solvespace.png
+%{_datadir}/pixmaps/solvespace-*.xpm
+
+%files -n lib%{name}
+%defattr(-,root,root)
+%{_libdir}/libslvs.so.*
+%doc COPYING.txt
+
+%files -n lib%{name}-devel
+%defattr(-,root,root)
+%{_includedir}/slvs.h
+%{_libdir}/libslvs.so
+%doc README.md
+
+%changelog
+* Tue Dec 03 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3-1mamba
+- update to 2.3
+
+* Sat Jul 09 2016 Ercole 'ercolinux' Carpanetto <ercole69@gmail.com> v2.1-1mamba
+- package created using the webbuild interface