[GHC] #15390: Figure out why CircleCI isn't generating haddocks

[GHC]

#15390: Figure out why CircleCI isn't generating haddocks
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        Reporter:  bgamari           |                Owner:  bgamari
            Type:  task              |               Status:  new
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Continuous        |              Version:  8.4.3
  Integration                        |
      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 mpickering):

 Is it because the build flavour that is used isn't the validate one? I
 think it's `quick` by default.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15390#comment:3>
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