relx_nodetool: not found - what is relx_nodetool?

After building 3.0.16 from source with OTP 22.3.4.26 on Ubuntu 22.04 the following error happens: `$ sudo riak-admin status /usr/local/riak/bin/riak-admin: 740: relx_nodetool: not found` What is relx_nodetool and where to find one? It does not come with either **relx** library or **rebar3** or Riak KV itself