Can't install base-4.0.0.0 !!

[guest]

mozhgan@Mozhgan-Kch:~/Desktop/base-4.0.0.0$ runhaskell Setup.hs configure --ghc

<interactive>:1:22:

attempting to use module `System.IO' (System/IO.hs) which is not loaded

<interactive>:1:22: Not in scope: `System.IO.stderr'

<interactive>:1:22: Not in scope: `System.IO.stdin' ghc-6.8.2: panic! (the 'impossible' happened)

(GHC version 6.8.2 for i386-unknown-linux):

interactiveUI:setBuffering

[simonmar]

If you need base-4, then install a newer version of GHC.

With a recent GHC you get:

> runhaskell -f ghc-6.12.0.20091011 Setup.hs install

Setup.hs:1:0:
    attempting to use module `Prelude' (./Prelude.hs) which is not loaded

still quite obscure, but at least not a panic. If you really want to build the base package, you need to either use cabal-install, or compile Setup.hs separately. But then you'll probably run into #3496.