ghc as an upgrade-stopper

[Alexy Khrabrov]

So I wanted to effect a cheap Snow Leopard upgrade with

time sudo port upgrade --enforce-variants installed

However, I used to have a ghc, and now it stops the process with:
...
Error: Target org.macports.fetch returned: ghc is not yet supported on
Mac OS X 10.6.x (SnowLeopard)

Now I did port uninstall clean ghc...  Do I need further obliteration
efforts to make upgrade go past it?

Cheers,
Alexy