-@url{https://www.gnu.org/software/texinfo/, Texinfo} is used for
-building documentation. Possibly you also need to install TUN/TAP
-interface utilities (depending on your operating system):
-@code{uml-utilities} package in most GNU/Linux distributions.
+@url{https://www.gnu.org/software/texinfo/, Texinfo} (6.1+ version is
+recommended) is used for building documentation. Possibly you also need
+to install TUN/TAP interface utilities (depending on your operating
+system): @code{uml-utilities} package in most GNU/Linux distributions.