By default Tmux environment is saved to a file in ~/.tmux/resurrect
dir.
Change this with:
set -g @resurrect-dir '/some/path'
Using environment variables or shell interpolation in this option is not allowed as the string is used literally. So the following won't do what is expected:
set -g @resurrect-dir '/path/$MY_VAR/$(some_executable)'
Only the following variables and special chars are allowed:
$HOME
, $HOSTNAME
, and ~
.