Hi John,
'ghc' won't automatically use the packages you've installed with 'cabal install',
but you've to add them to the 'ghc' call.
Thanks, that'll be the key to what's going on. I had assumed that installed packages would be automatically available for "import", as they are in Python. (The program I'm writing has the same functionality as a Python program I had written earlier, which probably biased me to thinking that way.)
__John