Can't deinstall SVR4 package in Openindiana Hipster-2015

Do you want to continue with the removal of this package [y,n,?,q] y
## Verifying package <SUNWvbox> dependencies in global zone
## Processing package information.
## Executing preremove script.
Removing VirtualBox services and drivers...
## Failed to parse the Solaris kernel major version.
## Failed.
pkgrm: ERROR: preremove script did not complete successfully