Here is how i install the packages:
sudo apt-get update
sudo apt-get install bind9-dyndb-ldap

i add the next lines in my named.conf.options file :

dynamic-db “bind9-dyndb” {
Library “ldap.so”;
arg “uri ldap://localhost”;
arg “base ou=dns,dc=example,dc=com”;
arg “authmethod simple”;
arg “basedn cn=admin,dc=example,dc=com”;
arg “password accessCode”;
};