[Haskell-cafe] ghc6.8: hiding uninstalled package?

This might seem like a silly question, but what's the reasoning behind the following behaviour? % ghc-pkg list dataenc /usr/lib/ghc-6.8.2/package.conf: % ghc --make -hide-package dataenc -isrc UT.hs ghc-6.8.2: unknown package: dataenc Hiding an uninstalled package doesn't seem to warrant failing compilation! /M