tmux

Originally from OpenBSD
tmux does better multiplexing compared to dtach, mtm and built-in terminal multiplexers (e.g. wezterm)
Void applies a reallocarray.patch
--enable-sixel is needed to prevent crashes in sixel terminals
Depends on libevent and netbsd-curses; libev is not supported
Check if --enable-utempter works with utmps as it allows tmux to update utmp (requires libutempter)
Check /usr/share/doc/tmux/examples/tmux.conf and install tmux.conf
Might backport some patches for 3.6a to fix borders and colors (e.g. Gentoo)
Should we explicitly pass --disable-cgroups as it requires systemd? Or will configure automatically detect that systemd is not supported?
FAQ recommends setting TERM to one of the following: screen or screen-256color or tmux or tmux-256color; prefer tmux-256color
If tmux runs without utf8 support remember to pass tmux -u; will substitute unicode glyphs with underscores if environment does support utf8
tmux server causes issues with locales and missing XDG variables (e.g. XDG_RUNTIME_DIR)
If colors are wrong add set -as terminal-features ",*:RGB" to tmux.conf
When in chroot set $TERM if tmux is being used

References