Where does a pkg installer install things?

I created a *.pkg installer for a command line tool following this guide: http://ift.tt/1C3XP3F.

After running the installer, and selecting "Install for all users", I can't find where my installed files are.

The installer says the setup will take 57.9MB and the copying section takes quite some seconds, so I assume files are actually being copied and there is not an issue with my installer.

Where did those files went? A find / didn't reveal anything.