diff --git a/source-builder/config/versions.cfg b/source-builder/config/versions.cfg
new file mode 100644
index 0000000..91a1d3d
--- /dev/null
+++ b/source-builder/config/versions.cfg
@@ -0,0 +1,5 @@
+# Generate version strings.
+
+%define __makeinfo_ver          %(%{__makeinfo} --version | %{__awk} 'NR==1 {print $NF}')
+
+