-and you have to install Go compiler 1.10+ version. @command{Make} (BSD
-and GNU versions are fine) is recommended for convenient building.
-@url{https://www.gnu.org/software/texinfo/, Texinfo} is used for
-building documentation (although tarballs already include it).
+and you have to install Go compiler 1.13+ version.
+@url{http://cr.yp.to/redo.html, redo} build system is recommended for
+convenience. @url{https://www.gnu.org/software/texinfo/, Texinfo} is
+used for building documentation (although tarballs already include it).