[GHC] #16368: Boot GHC's libffi installation path leaks into stage1 build

[GHC]

#16368: Boot GHC's libffi installation path leaks into stage1 build
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        Reporter:  sgraf             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  ⊥
       Component:  Build System      |              Version:  8.6.3
  (Hadrian)                          |
      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 sgraf):

 That patch doesn't help at all. It seems we really depend on the libffi
 bundled with boot GHC(?).

 The problem is probably with my Nix shell and this recent change
 https://github.com/NixOS/nixpkgs/commit/a7c774300b7eab779afb9a81b3f02f3bed69c943.
 So, Nix provides a boot GHC that is built and bundled with the system
 libffi. I still have to figure out where it stores libffi's headers.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16368#comment:3>
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