[GHC] #3494: missing build system dependency

[GHC]

#3494: missing build system dependency
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Reporter:  duncan            |          Owner:  igloo           
    Type:  bug               |         Status:  new             
Priority:  normal            |      Component:  Build System    
 Version:  6.11              |       Severity:  minor           
Keywords:                    |       Testcase:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
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 The `inplace/bin/ghc-cabal` does not get rebuilt automatically if the
 Cabal sources change.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3494>
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