diff --git a/cronjob-dehydrated b/cronjob-dehydrated
index 92b623f..ec31e99 100755
--- a/cronjob-dehydrated
+++ b/cronjob-dehydrated
@@ -1,3 +1,6 @@
 #!/bin/bash
 
+# Delay the run for 15 hours (from midnight) and then run at a random time within 3 hours after that.
+sleep $(( 54000 + (RANDOM % 10800) ))
+
 /usr/sbin/dehydrated -c >/dev/null
diff --git a/cronjob-update-packages-list b/cronjob-update-packages-list
index 989cc4e..824965d 100755
--- a/cronjob-update-packages-list
+++ b/cronjob-update-packages-list
@@ -11,15 +11,19 @@
 
 # Create package list depending on system type.
 case "$ID" in
+  'alpine')
+    apk list -I | cut -d' ' -f1 | rev | cut -d- -f3- | rev >/etc/pkglist
+    ;;
   'debian'|'ubuntu')
-    /usr/bin/dpkg-query --show --showformat='${Package}\n' >/etc/pkglist
+    dpkg-query --show --showformat='${Package}\n' >/etc/pkglist
     ;;
   'slackware')
-    /usr/sbin/slackpkg -batch=on -default_answer=y generate-template "$(hostname --short)" >/dev/null
-    [[ ! -e /etc/pkglist ]] && ln -sf "/etc/slackpkg/templates/$(hostname --short).template" /etc/pkglist
+    slackpkg -batch=on -default_answer=y generate-template "$(hostname --short)" >/dev/null
+    [[ -L /etc/pkglist ]] && rm -f /etc/pkglist
+    ls -1 /var/log/packages/ | rev | cut -d- -f4- | rev >/etc/pkglist
     ;;
   'void')
-    /usr/sbin/xbps-query -l | awk '{ print $2 }' | rev | cut -d- -f2- | rev >/etc/pkglist
+    xbps-query -l | awk '{ print $2 }' | rev | cut -d- -f2- | rev >/etc/pkglist
     ;;
   *)
     printf "%s: %s\\n" "${BASH_SOURCE[0]}" "Unsupported system." >&2
diff --git a/do-backup b/do-backup
index dd3f0d4..0a8e35f 100755
--- a/do-backup
+++ b/do-backup
@@ -130,7 +130,7 @@ mountpoint "$BACKUP_MOUNTPOINT/" >/dev/null 2>&1 || {
 }
 
 # Do the backup.
-rsync "${RSYNC_OPTIONS[@]}" "${RSYNC_OPTIONS_VERBOSE[@]}" "${RSYNC_FILTER[@]}" "$RSYNC_SOURCE" "$BACKUP_DESTDIR" >"$RSYNC_LOG" 2>&1
+ionice -c Idle nice -n 19 rsync "${RSYNC_OPTIONS[@]}" "${RSYNC_OPTIONS_VERBOSE[@]}" "${RSYNC_FILTER[@]}" "$RSYNC_SOURCE" "$BACKUP_DESTDIR" >"$RSYNC_LOG" 2>&1
 ERR="$?"
 
 # Send a notification and mail a log if there were errors.