I am short of space on my root partition, so I tried this
- Copied the
DevDocumentation.pkgdown locally from the Packages folder. - Show Package Contents on it, moved down to the Info.plist and edited it with Property List Editor
- Set
IFPkgFlagRootVolumeOnlyto No - Created a
/tmpfolder on the Volume I wanted to install to.
chroot environment on that volume. As I just care for the HTML / PDF dox at the moment, it's OK for now.