[GHC] #11153: building lens-4.12.3 impossible happened: dupe _hs_primitive_memcpy

[GHC]

#11153: building lens-4.12.3 impossible happened: dupe _hs_primitive_memcpy
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        Reporter:  blippy             |                Owner:
            Type:  bug                |               Status:  infoneeded
        Priority:  normal             |            Milestone:
       Component:  libraries (other)  |              Version:  7.10.2
      Resolution:                     |             Keywords:
Operating System:  Windows            |         Architecture:  x86
 Type of failure:  None/Unknown       |            Test Case:
      Blocked By:                     |             Blocking:
 Related Tickets:                     |  Differential Rev(s):
       Wiki Page:                     |
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Comment (by thomie):

 Hmm, I can't reproduce this. I installed haskell-platform 7.10.2, and then
 ran `stack install lens --resolver=lts-3.16`. Perhaps it really is a
 Windows-only bug.

 Part of the problem is that `haskell-platform` and `stack` don't play well
 together. See for example: https://mail.haskell.org/pipermail/haskell-
 community/2015-September/000014.html. So one solution would be to
 uninstall `haskell-platform`, and use only `stack`.

 Maybe upgrading to `haskell-platform 7.10.3` could also work  (after
 uninstalling 7.10.2). 7.10.3 has the same version of `primitive` installed
 as `stack` wants to install, so that might circumvent the issue. But you
 might run into other problems later.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11153#comment:3>
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