title: Ambiguous module name `Prelude'
body: <p>I get this when i want to recompile xmonad to change the configuration:</p>
  
  <pre><code>Implicit import declaration:
      Ambiguous module name `Prelude':
        it was found in multiple packages: base haskell98-2.0.0.0
  </code></pre>
  
  <p>Xmonad was installed via pacman. When i got this error i removed xmonad from pacman and then tried to cabal install xmonad. I got the above error again but i was able to solve it by removing haskell98 from the cabal file.</p>
  
  <p>Now i want to reconfigure xmonad with MOD-Q the error reappears and i have no clue how to fix this. Any help appreciated.</p>
  
  <p>I use GHC version 7.0.3 (from Haskell platform)</p>