tmux new window in new session

.zsh.d/40-always-tmux.zsh

@@ -1,10 +1,11 @@
-if [[ "$TERM" == screen* ]] || [[ -n "$TMUX" ]]; then
+if [[ "$TERM" == screen-256color ]] || [[ -n "$TMUX" ]]; then
   return 1
 fi
 
 if tmux list-sessions && (tmux list-sessions | test -n "$0"); then
   session_id=`date +%Y%m%d%H%M%S`
   tmux new-session -d -t base -s $session_id
+  tmux select-window -t "$( tmux new-window -P -F \#{window_index} )"
   tmux attach-session -t $session_id \; set-option destroy-unattached
 else
   tmux new-session -s base