[OpenIndiana-discuss] Older vbox (5.0.28) failure - maybe something simple

[Harry Putnam]

Wanting to get vms running that I brought over when making the move to
hipster from 151_9... I found first that newer vbox versions are a
no-go for now.

So, went back to 5.0.28 and I can see it wants to install .. it went
like this (large chunks elided):

root # pkgadd -d ./VirtualBox-5.0.28-SunOS-amd64-r111378.pkg 

The following packages are available:
  1  SUNWvbox     Oracle VM VirtualBox
                  (i386) 5.0.28,REV=2016.10.18.20.13.111378
  [...]

  Current administration requires that a unique instance of the
  <SUNWvbox> package be created.  However, the maximum number of
  instances of the package which may be supported at one time on the
  same system has already been met.

  No changes were made to the system.


root # pkgrm SUNWvbox

  The following package is currently installed:
     SUNWvbox  Oracle VM VirtualBox
             (i386) 5.1.6,REV=2016.09.19.10.01.110634

  [...]

 ## Updating system information.

  Removal of <SUNWvbox> was successful.
  ## Updating system information.

  Removal of <SUNWvbox> was successful.


So, I did have a Vbox pkg failure with an earlier attempted install of
vbox version 5.1.16 and apparently it was seen as installed.

So, as above I ran pkgrm and was told the pkg was successfully
removed.

Then again ran:

pkgadd -d ./VirtualBox-5.0.28-SunOS-amd64-r111378.pkg 

  The following packages are available:
    1  SUNWvbox     Oracle VM VirtualBox
                  (i386) 5.0.28,REV=2016.10.18.20.13.111378
  [...]
  
  /opt/VirtualBox/vboxwebsrv <linked pathname>
  /opt/VirtualBox/webtest <linked pathname>
  [ verifying class <manifest> ]
  ## Executing postinstall script.

  Checking for older bits...
  ## Failed to parse the Solaris kernel major version.
  ## ERROR!! Failed to remove older/partially installed bits.
  pkgadd: ERROR: postinstall script did not complete successfully

I wondered if this might be something fairly easy to fix, but don't
have much of a clue as to where to start.