[GHC] #15218: HEAD doesn't build without sphinx-build

[GHC]

#15218: HEAD doesn't build without sphinx-build
-------------------------------------+-------------------------------------
        Reporter:  jrp               |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  low               |            Milestone:  8.6.1
       Component:  Build System      |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Building GHC      |  (amd64)
  failed                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 Is it possible that you pulled without running `git submodule update`?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15218#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler