[GHC] #11109: build broken in libffi/ when `install-sh` is used

[GHC]

#11109: build broken in libffi/ when `install-sh` is used
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        Reporter:  hvr               |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Build System      |              Version:  7.10.2
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1494
       Wiki Page:                    |
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Comment (by Herbert Valerio Riedel <hvr@…>):

 In [changeset:"4976ab2bd333e28a1d4cfe924d4d8ebb49489366/ghc"
 4976ab2b/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="4976ab2bd333e28a1d4cfe924d4d8ebb49489366"
 Follow-up fix to 3e2a4eefbed7002437c3f (re #11109)

 Using `:` as sed-`s`-expr separator is not a good idea on windows, as
 this can result in an expression like

    's:@INSTALL@:$(subst ../install-sh,E:/msys64/home/foo/ghc/install-
 sh, at INSTALL@):g'

 (note the `E:/` drive component)

 Using `|` instead of `:` has less risk of collision with the substitution
 expression
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11109#comment:4>
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