Tmux 3.2 includes support to use `$XDG_CONFIG_HOME/tmux/tmux.conf` as well as `~/.config/tmux/tmux.conf` for configuration file.
nixfmt
This replaces some derivation outputs by simple strings rather than full Nix store paths. This removes the need to download the whole derivation when all we need is a static string.
See #575 for discussion.