[GHC] #8723: sdist should not have to build everything

[GHC]

#8723: sdist should not have to build everything
-------------------------------------+-------------------------------------
        Reporter:  nomeata           |                   Owner:
            Type:  task              |                  Status:  patch
        Priority:  low               |               Milestone:  7.12.1
       Component:  Build System      |                 Version:  7.6.3
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D917
-------------------------------------+-------------------------------------
Changes (by thomie):

 * status:  new => patch
 * differential:   => Phab:D917
 * milestone:   => 7.12.1


Comment:

 Took me quite a bit longer then one hour, but I have a patch up in
 Phab:D917.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8723#comment:2>
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