[GHC] #7150: unjustified overlapping instances error

[GHC]

#7150: unjustified overlapping instances error
-------------------------+--------------------------------------------------
    Reporter:  maeder    |       Owner:                           
        Type:  bug       |      Status:  new                      
    Priority:  normal    |   Milestone:                           
   Component:  Compiler  |     Version:  7.6.1-rc1                
    Keywords:            |          Os:  Solaris                  
Architecture:  x86       |     Failure:  GHC rejects valid program
  Difficulty:  Unknown   |    Testcase:                           
   Blockedby:            |    Blocking:                           
     Related:            |  
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Comment(by simonpj):

 Is there a flag I can give to 'make' to say "build with this particular
 GHC"?  Eg
 {{{
 make WITH_GHC=/home/simnpj/test/ghc
 }}}
 I want to build with HEAD not the installed GHC on my machine

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7150#comment:3>
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