[Hackage] #349: cabal-install always finds conflicting dependencies between base 3 and 4 on ghc 6.9 and 6.10

[Hackage]

#349: cabal-install always finds conflicting dependencies between base 3 and 4 on
ghc 6.9 and 6.10
---------------------------------+------------------------------------------
  Reporter:  ganesh              |        Owner:  duncan        
      Type:  defect              |       Status:  closed        
  Priority:  high                |    Milestone:  Cabal-1.6     
 Component:  cabal-install tool  |      Version:                
  Severity:  major               |   Resolution:  fixed         
  Keywords:                      |   Difficulty:  hard (< 1 day)
Ghcversion:  6.9                 |     Platform:                
---------------------------------+------------------------------------------
Changes (by duncan):

  * status:  new => closed
  * resolution:  => fixed

Comment:

 Fixed.

 It no longer finds that it's a conflict. However to have it actually pick
 base 3 for most packages you need to modify your 00-index.tar file to
 contain a file `preferred-versions` that looks like:

 {{{
 base < 4
 }}}

 Eventually this will be in the standard index downloaded from hackage.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/349#comment:6>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects