GHC + Gnome = no go - It act like it is not installed

[looop]

Hey I am using FVWM as standard GUI on my OpenBSD system and under FVWM I installed GHC, and enjoyed it, but then a girlfriend need to borrow my computer and I installed Gnome, 'cause that is what she is use to.
But we discovered a problem when we in Gnome tries: ghc or ghci in both Gnome Terminal / RXVT / XTerm we get unknown command.
Then we tried booting up in FVWM and no problem with the command, then for testing we installed OpenBox and there was not a problem.
Can anyone explain what is wrong?
I installed GHC with:

pkg_add -i -vv ghc

[jggimi]

From your problem description, it sounds like the $PATH environment variable is unset or not set correctly. By default, ghc and ghci should be found in /usr/local/bin, and that does not appear to be in $PATH at the time you attempt to issue the command.

I'm not a Gnome user; if you use Google with "gnome" and "$path" as keywords there are plenty of hits and you may find a fix on the first page.

[looop]

thank you very much