I'm having troubles with the system installer (`/System/Library/CoreServices/Installer.app`) where certain things are not installing and are not providing sufficient details in `/var/log/install.log`.

I get the dreaded "The installation failed" error:
[![The installation failed](https://i.stack.imgur.com/l38bt.png)](https://i.stack.imgur.com/l38bt.png)

Without sufficient details within the log as noted above.

Is there a way to raise verbosity so as to ascertain precisely where it may be failing within the install process? I have been hoping that there is a flag that can be executed to increase this verbosity, but I've not found anything for 

```
/System/Library/CoreServices/Installer.app/Contents/MacOS/Installer 

```

as of yet when executing it from the shell...