dist.lua defines work_dir explicitly.

extra/dist/dist.lua

@@ -123,6 +123,7 @@ local force_cfg = {
     pid_file    = fio.pathjoin(cfg.PIDS, instance .. '.pid'),
     wal_dir     = fio.pathjoin(cfg.XLOGS, instance),
     snap_dir    = fio.pathjoin(cfg.SNAPS, instance),
+    work_dir    = fio.pathjoin(cfg.SNAPS, instance),
     username    = cfg.USERNAME,
     logger      = fio.pathjoin(cfg.LOGS, instance .. '.log'),
     console     = fio.pathjoin(cfg.PIDS, instance .. '.control'),