-major_version=$(echo AC_PACKAGE_VERSION | sed 's/^\([[0-9]]\)*\.[[0-9]]*\.[[0-9]]*.*$/\1/')
-minor_version=$(echo AC_PACKAGE_VERSION | sed 's/^[[0-9]]*\.\([[0-9]]*\)\.[[0-9]]*.*$/\1/')
-patchlevel_version=$(echo AC_PACKAGE_VERSION | sed 's/^[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\).*$/\1/')
-AC_SUBST([MAJOR_VERSION], [$major_version])
-AC_SUBST([MINOR_VERSION], [$minor_version])
-AC_SUBST([PATCHLEVEL_VERSION], [$patchlevel_version])
-AC_DEFINE_UNQUOTED([VERSION_MAJOR], $major_version, [UST major version number])
-AC_DEFINE_UNQUOTED([VERSION_MINOR], $minor_version, [UST minor version number])
-AC_DEFINE_UNQUOTED([VERSION_PATCHLEVEL], $patchlevel_version, [UST patchlevel version number])
+AC_SUBST([MAJOR_VERSION], [V_MAJOR])
+AC_SUBST([MINOR_VERSION], [V_MINOR])
+AC_SUBST([PATCHLEVEL_VERSION], [V_PATCH])