[GHC] #16053: GHC build regression ("HSghc-prim-0.5.3.p_o: copyFile: does not exist")

[GHC]

#16053: GHC build regression ("HSghc-prim-0.5.3.p_o: copyFile: does not exist")
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        Reporter:  hvr               |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.8.1
       Component:  Build System      |              Version:  8.7
  (make)                             |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Building GHC      |  Unknown/Multiple
  failed                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5169
       Wiki Page:                    |
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Comment (by watashi):

 Attempt to address this in
 https://gitlab.haskell.org/ghc/ghc/merge_requests/65

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16053#comment:10>
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