Known-services log file not created

i've downloaded the latest Bro version from git yesterday: i've
noticed that known-services.log is no more generated even if
known-services.bro is present in loaded_scrips.log.
I've used the below commands to build bro:

git clone --recursive git://
make install

What's wrong?

Are you configuring your Site::local_nets? With broctl, this is typically done by configuring your local networks in networks.cfg.