Where does a pkg installer install things? I created a *.pkg installer for a command line tool following this guide: Packaging a daemon for OS X.

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 go? A find / didn't reveal anything.
You can check it from Terminal. Navigate to the folder where You have Your pkg file. Enter this:

mkdir Foo
cd Foo
xar -xf ../NAME_OF_YOUR.pkg
lsbom Bom


This will list files/paths which are included in this pkg.