diff --git a/README.md b/README.md
index 77dac04..a52a98c 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # gn
 
+GN is a meta-build system that generates build files for Ninja.
+
diff --git a/gn.spec b/gn.spec
new file mode 100644
index 0000000..a18f78f
--- /dev/null
+++ b/gn.spec
@@ -0,0 +1,59 @@
+Name:          gn
+Version:       0.20190301git
+Release:       1mamba
+Summary:       A meta-build system that generates build files for Ninja
+Group:         Development/Tools
+Vendor:        openmamba
+Distribution:  openmamba
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://gn.googlesource.com/gn/+/master/README.md
+## GITSOURCE https://gn.googlesource.com/gn.git master
+Source:        https://gn.googlesource.com/gn.git/master/gn-%{version}.tar.bz2
+License:       BSD
+## AUTOBUILDREQ-BEGIN
+BuildRequires: glibc-devel
+BuildRequires: libgcc
+## AUTOBUILDREQ-END
+BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+
+%description
+GN is a meta-build system that generates build files for Ninja.
+
+%debug_package
+
+%prep
+%setup -q
+
+cat > tools/gn/last_commit_position.h << _EOF
+// Generated by build/gen.py.
+
+#ifndef OUT_LAST_COMMIT_POSITION_H_
+#define OUT_LAST_COMMIT_POSITION_H_
+
+#define LAST_COMMIT_POSITION "0 (0)"
+
+#endif  // OUT_LAST_COMMIT_POSITION_H_
+_EOF
+
+%build
+python build/gen.py --no-last-commit-position
+ninja -C out
+
+%check
+out/gn_unittests
+
+%install
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+install -D -m0755 out/gn %{buildroot}%{_bindir}/gn
+
+%clean
+[ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
+
+%files
+%defattr(-,root,root)
+%{_bindir}/gn
+%doc AUTHORS LICENSE
+
+%changelog
+* Fri Mar 01 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 0.20190301git-1mamba
+- package created using the webbuild interface