[GHC] #15982: Hadrian's `--configure` flag is broken on Windows

[GHC]

#15982: Hadrian's `--configure` flag is broken on Windows
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        Reporter:  snowleopard       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.3
       Component:  Build System      |              Version:  8.6.2
  (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 snowleopard):

 Invoking Hadrian using the `build.cabal.bat` script seems to work fine
 too:

 {{{
 hadrian\build.cabal.bat --configure -j --flavour=quickest --integer-simple
 }}}

 So this is somehow related to my Stack setup. Can anyone reproduce?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15982#comment:1>
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