diff --git a/deploy/deploy.sh b/deploy/deploy.sh
index 03a2f30..46ae95b 100755
--- a/deploy/deploy.sh
+++ b/deploy/deploy.sh
@@ -43,7 +43,11 @@ ssh "root@$HOST" '
   install -m 755 /opt/hnefatafl/app/deploy/hnefatafl-rollup.sh /usr/local/bin/hnefatafl-rollup.sh
   install -m 755 /opt/hnefatafl/app/deploy/hnefatafl-backup.sh /usr/local/bin/hnefatafl-backup.sh
   install -m 644 -D /opt/hnefatafl/app/deploy/traffic.py /usr/local/lib/hnefatafl/traffic.py
-  install -m 644 /opt/hnefatafl/app/deploy/hnefatafl.cron /etc/cron.d/hnefatafl
+  # On a host the hall shares, its hall-nightly.sh runs the rollup and backup
+  # of every game and checks in with Sentry once for all; a game on a box of
+  # its own schedules its own.
+  if [ -f /etc/cron.d/gamehall ]; then rm -f /etc/cron.d/hnefatafl
+  else install -m 644 /opt/hnefatafl/app/deploy/hnefatafl.cron /etc/cron.d/hnefatafl; fi
   mkdir -p /var/log/hnefatafl
   systemctl daemon-reload
   systemctl enable --now hnefatafl
diff --git a/deploy/hnefatafl-backup.sh b/deploy/hnefatafl-backup.sh
index 2e2ab13..1363bab 100755
--- a/deploy/hnefatafl-backup.sh
+++ b/deploy/hnefatafl-backup.sh
@@ -5,6 +5,8 @@
 # Ledgers are append-only JSONL; the game server never needs stopping.
 # Sentry Crons check-in: /root/.hnefatafl-sentry-cron holds the check-in
 # URL (absent file = no check-ins). SCHEDULE must match /etc/cron.d/hnefatafl.
+# On a host the hall shares, hall-nightly.sh runs this and checks in once
+# for every game, so the file is absent and the exit status is the word.
 set -u
 SCHEDULE="23 7 * * *"
 BUCKET="kestrel-wizwar-backups"
@@ -27,9 +29,10 @@ checkin() {
 
 if [ ! -s /root/.config/rclone/rclone.conf ]; then
   echo "$(date -Is) skipped: rclone is not configured" >> "$LOG"
-  exit 0
+  exit 1
 fi
 
+status=0
 {
   echo "=== $(date -Is) backup start"
   if rclone sync "$SRC" "spaces:$BUCKET/$PREFIX/current" --exclude 'rollup.jsonl' 2>&1 &&
@@ -37,6 +40,7 @@ fi
     checkin ok
   else
     checkin error
+    status=1
   fi
   CUTOFF=$(date -d "90 days ago" +%Y-%m-%d)
   rclone lsf "spaces:$BUCKET/$PREFIX/snapshots/" --dirs-only 2>/dev/null | \
@@ -49,3 +53,4 @@ fi
   done
   echo "=== $(date -Is) backup done"
 } >> "$LOG" 2>&1
+exit $status
diff --git a/deploy/hnefatafl-rollup.sh b/deploy/hnefatafl-rollup.sh
index 690853b..e902dfc 100755
--- a/deploy/hnefatafl-rollup.sh
+++ b/deploy/hnefatafl-rollup.sh
@@ -8,7 +8,9 @@
 #   Cron: /etc/cron.d/hnefatafl, installed by deploy.sh; SCHEDULE below
 #   must match it, because the Sentry monitor is told the same shape.
 #   Sentry Crons check-in: /root/.hnefatafl-sentry-cron-rollup holds the
-#   check-in URL (absent = no check-ins).
+#   check-in URL (absent = no check-ins). On a host the hall shares,
+#   hall-nightly.sh runs this and checks in once for every game, so the
+#   file is absent and the exit status is the word.
 set -u
 OUT="/var/lib/hnefatafl/rollup.jsonl"
 LOG="/var/log/hnefatafl/rollup.log"
@@ -78,4 +80,4 @@ with open(out + ".tmp", "w") as fh:
 os.replace(out + ".tmp", out)
 print("%s rolled: %d people, %d requests, %d rooms" % (day, len(t["addresses"]), t["human"], created))
 PY
-then checkin ok; else checkin error; fi
+then checkin ok; else checkin error; exit 1; fi