The ebuild for ghc-6.4 apparently forgets to set some compile option to allow ghc to run in interactive mode. Reproducible: Always Steps to Reproduce: 1. run ghci from the dev-lang/ghc-6.4 package Actual Results: The following message is printed to the console: ghc-6.4: not built for interactive use Expected Results: Interactive mode should be allowed to run.
This is deliberate. GHCi does not work yet on the AMD64 arch. We hope that GHCi will work in the GHC 6.4.1 release.