postinstall scriptlet (through /bin/sh): 
dir="/var/lib/jack/tmp" 
fstype=ramfs 
fstab=/etc/fstab 
mtab=/etc/mtab 
fstab_entry="jacktmp    "$dir"  "$fstype"       defaults        0 0" 
 
mount_jackit_tmpdir() 
{ 
echo -ne "Mounting jack temporary directory...\t" 
mount $dir && \ 
echo "done" || \ 
{ echo "failed to mount jack temporary directory"; exit 0; } 
    if [ -f /etc/rc.d/init.d/jack ]; then 
        /bin/sh /etc/rc.d/init.d/jack 
    fi 
} 
 
if [ -f $fstab ]; then 
echo -ne "Finding jack temporary directory mount point in $fstab...\t" 
    if grep -qs "jack" $fstab; then 
        if ! grep -qs "$dir" $fstab; then 
            echo "found" 
            echo "but this entry does not match the one needed by jack" 
            echo "Please add the following line to $fstab manually" 
            echo "$fstab_entry" 
.......... 
 
Такие вещи надо делать отдельной утилитой но ни в коем случае как скрипт 
Пакет будет в contrib, до исправления ошибки