[GHC] #10479: Make GHC install libraries to, e.g. xhtml-3000.2.1-0ACfOp3hebWD9jGWE4v4Gh

[GHC]

#10479: Make GHC install libraries to, e.g. xhtml-3000.2.1-0ACfOp3hebWD9jGWE4v4Gh
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              Reporter:  ezyang      |             Owner:  ezyang
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:  7.10.2
             Component:  Package     |           Version:  7.10.1
  system                             |  Operating System:  Unknown/Multiple
              Keywords:              |   Type of failure:  None/Unknown
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D922   |
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 The GHC version of https://github.com/haskell/cabal/issues/2437 ; we need
 to adapt ghc-cabal to use the correct install paths. I have an in-flight
 patch, see the Phabricator. However, applying the change to HEAD is
 blocked by https://github.com/haskell/cabal/issues/2638 since there are
 some Cabal changes, which necessitate updating to Cabal head.

 Cabal maintainers have expressed interest in this being merged into 7.10.
 To do this, we first have to merge the Cabal change into the 7.10 branch
 of Cabal, and apply the differential to GHC 7.10. (We shouldn't be blocked
 by the Cabal HEAD changes as those are not on the 7.10 branch.) If 7.10
 release managers agree to let this patch in I volunteer to coordinate the
 changes.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10479>
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