Recipe for powerline + tmux

[binarykitchen]

Hello guys

Is there a recommendation how to configure powerline + tmux within prezto best?

At the moment I always have to manually enter the command powerline-config tmux setup to make tmux work.

Not sure where to put this in? In which dotfile? Why isn't prezto already doing this for me when I have prezto's tmux module enabled?

Furthermore I have this line in my .tmux.conf

if-shell 'env "$POWERLINE_CONFIG_COMMAND" tmux setup' '' 'run-shell "powerline-config tmux setup"'

although it's never happening because $POWERLINE_CONFIG_COMMAND is empty.

Any clues?