Okay, it's probably more a ghc6 problem.
# runhaskell Setup.lhs build -v
Creating dist/build (and its parents)
Creating dist/build/autogen (and its parents)
Preprocessing library xmonad-0.9.1...
Preprocessing executables for xmonad-0.9.1...
Building xmonad-0.9.1...
Building library...
Creating dis
Public bug reported:
Binary package hint: xmonad
I suspect a (hopefully simple?) build-dependency issue and/or
incompatibilities with related packages.
First the following build-dep packages are not available in the repository:
# apt-get build-dep xmonad
Reading package lists... Done
Building de