utmp-classic is used at run time in 4 crates (of which 4 optionally). It is a direct run-time dependency in 3 crates.

Depender (with downloads and own rev deps) utmp-classic version
22K 119 uucore optional ^0.1.6
230 1 uu_uptime ^0.1.6
220 1 uu_users ^0.1.6