[GHC] #15948: Hadrian cannot build on Windows

[GHC]

#15948: Hadrian cannot build on Windows
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.8.1
       Component:  Build System      |              Version:  8.7
  (Hadrian)                          |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         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 bgamari):

 Indeed `cp -R inplace/mingw _build` seems to allow the build to proceed.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15948#comment:1>
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