[GHC] #16073: Hadrian build fails on Windows

[GHC]

#16073: Hadrian build fails on Windows
-------------------------------------+-------------------------------------
           Reporter:  bgamari        |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  high           |         Milestone:  8.8.1
          Component:  Build System   |           Version:  8.6.3
  (Hadrian)                          |
           Keywords:                 |  Operating System:  Windows
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 See https://gitlab.haskell.org/ghc/ghc/-/jobs/2838.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16073>
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