I am short of space on my root partition, so I tried this
- Copied the
DevDocumentation.pkg down locally from the Packages folder.
- Show Package Contents on it, moved down to the Info.plist and edited it with Property List Editor
IFPkgFlagRootVolumeOnly to No
- Created a
/tmp folder on the Volume I wanted to install to.
Now I could install the documentation on that Volume. It ended with an error though, because the post install script throws up as it can't setup a
environment on that volume. As I just care for the HTML / PDF dox at the moment, it's OK for now.