[GHC] #15794: shell.nix depends on build artifacts

[GHC]

#15794: shell.nix depends on build artifacts
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        Reporter:  int-index         |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Build System      |              Version:  8.6.1
  (Hadrian)                          |
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
 Type of failure:  Building GHC      |  Unknown/Multiple
  failed                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 For what it's worth, I use generally use Alp's
 [[https://github.com/alpmestan/ghc.nix|ghc.nix]] to build GHC under NixOS.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15794#comment:1>
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