{ self, ... }:
{
  perSystem =
    {
      pkgs,
      lib,
      system,
      ...
    }:
    {
      packages.muchsync = self.libWithPkgs.${system}.makeWrapper pkgs.muchsync {
        runtimeInputs = [ pkgs.notmuch ] ++ lib.optionals pkgs.stdenv.isLinux [ pkgs.iputils ];
        env = {
          NOTMUCH_CONFIG =
            pkgs.writeText "notmuch-config"
              self.packages.${pkgs.system}.mutt.passthru.notmuchConfig;
        };
        wrapper = ''

          # Create Maildir structure if it doesn't exist
          mkdir -p "$HOME/Maildir"/{cur,new,tmp}

          # Check if a host is reachable
          check_host() {
            local host=$1
            ping -W2 -c1 "$host" >/dev/null 2>&1
          }

          # Smart host selection - try spora, nether, retiolum, then tor
          find_green_host() {
            if check_host green.s; then
              echo "green.s"
            elif check_host green.n; then
              echo "green.n"
            elif check_host green.r; then
              echo "green.r"
            else
              echo "tor"
            fi
          }

          # Check if arguments look like flags or a hostname
          has_hostname=false
          for arg in "$@"; do
            case "$arg" in
              -*) ;;  # This is a flag
              *) has_hostname=true; break ;;  # Found a non-flag argument
            esac
          done

          # If only flags provided (or no args), do a sync with green host
          if [ "$has_hostname" = "false" ]; then
            host=$(find_green_host)
            echo "Syncing with $host..." >&2

            if [ "$host" = "tor" ]; then
              # Build dependencies lazily
              echo "Building tornade..." >&2
              tornade_path=$(nix build --no-link --print-out-paths "${self}#tornade")
              clan_path=$(nix build --no-link --print-out-paths "${self}#clan-cli")

              # Get tor hostname using clan CLI
              tor_hostname=$(CLAN_DIR="${self}" "$clan_path/bin/clan" vars get green tor-ssh/tor-hostname)

              # Use muchsync with custom ssh command via tornade
              exec muchsync "$@" -s "$tornade_path/bin/tornade ssh" lass@"$tor_hostname"
            else
              exec muchsync "$@" lass@"$host"
            fi
          else
            # Pass through arguments to muchsync
            exec muchsync "$@"
          fi
        '';
      };
    };
}