{
  writeShellApplication,
  tmux,
  symlinkJoin,
}: let
  tmux-register-session = writeShellApplication {
    name = "__tmux-register-session";
    runtimeInputs = [tmux];
    text = ''
      last=/tmp/TMUX_LAST
      this="$(tmux display-message -p '#S')"
      if [ ! -f "$last" ] || [ "$(cat "$last")" != "$this" ]; then
          echo "$this" >"$last"
      fi
    '';
  };
in
  symlinkJoin {
    name = "tmux-sessionizer";
    paths = [
      tmux-register-session
    ];
  }