Upon installation of the new zone, I was surprised that some of the basic pieces like pkgadd was missing. It appears (at least for zones) that IPS is definitely the default now.
Unfortunately, there are times when you still want those commands... like when testing build processes written for Solaris 10.
Following the instructions in the previous blog, here's what you need to do to get it working:
If this is the first time...
[kallisti:malachi(127)] ~/work% pfexec pkg set-authority -O http://pkg.opensolaris.org/dev/ os-dev
[kallisti:malachi(127)] ~/work% pfexec pkg install SUNWpkgcmds