[GHC] #10205: On Windows ghc-pkg always reports cache out of date

[GHC]

#10205: On Windows ghc-pkg always reports cache out of date
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        Reporter:  hgolden           |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.10.2
       Component:  ghc-pkg           |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Windows           |            Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D990
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Comment (by svenpanne):

 OK, running 'ghc-pkg recache' fixes the problem, but:

   a) You have to do it as an Administrator, which might not be an option
 for all users.

   b) The Windows installer for 7.10rc2 shouldn't install the package DB
 like this, forcing users to recache as an Administrator directly after
 installation.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10205#comment:20>
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