[home]
watch-dir       = /home/user
mode            = rsyncdirect
destination-dir = user@host:path
-- = %RSYNC-ARGS% -AX -x --backup --backup-dir=/path_to_backup -e 'ssh -i /home/user/.ssh/backup_key' %watch-dir%/ %destination-dir%/
splitting = thread
seccomp-filter = 1

# clsync --config-file /etc/clsync/clsync.conf -K home
Bad system call

$ uname -rv
5.5.9-un-def-alt1 #1 SMP PREEMPT Thu Mar 12 11:29:41 UTC 2020
$ rpm -q glibc
glibc-2.30-alt1.x86_64