[Hackage] #615: cabal install attempts to reinstall "same version" of already-installed package

[Hackage]

#615: cabal install attempts to reinstall "same version" of already-installed
package
---------------------------------+------------------------------------------
  Reporter:  guest               |        Owner:      
      Type:  defect              |       Status:  new 
  Priority:  normal              |    Milestone:      
 Component:  cabal-install tool  |      Version:  HEAD
  Severity:  normal              |     Keywords:      
Difficulty:  unknown             |   Ghcversion:      
  Platform:  Linux               |  
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 This is on ghc 6.12.1 rc2. The problem occurs because I installed a
 different version of ghc-syb than the one in hackage, but which retained
 the same version *number* as the one in hackage. Bumping up the version
 number of the alternate version, solved the problem, but it was confusing,
 and I believe I may have experienced this before without understanding
 what was happening.

 The alternate version of ghc-syb I used is at git://github.com/waern/ghc-
 syb.git

 I was working on scion to try and get it to build on ghc 6.12.1, and when
 I tried to cabal install it from my working directory, cabal install
 started to reinstall ghc-syb - even though ghc-syb was already installed,
 with the same version number as the version it was trying to reinstall.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/615>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects