[GHC] #12940: ghc-8.0.2 RC1 libs installed under package dirs vs Cabal installing packages under abi dir

[GHC]

#12940: ghc-8.0.2 RC1 libs installed under package dirs vs Cabal installing
packages under abi dir
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        Reporter:  juhpetersen   |                Owner:
            Type:  bug           |               Status:  new
        Priority:  normal        |            Milestone:  8.0.2
       Component:  Build System  |              Version:  8.0.2-rc1
      Resolution:                |             Keywords:
Operating System:  Linux         |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Comment (by slyfox):

 Sounds like a dupe of #12770

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12940#comment:2>
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