Windows build broken

[Simon Peyton Jones]

My Windows build is broken again.  With a clean checkout, I get ""

Target platform inferred as: x86_64-unknown-mingw32

Unknown OS msys
How can I get past this?  Full log below.
Simon




make[1]: Leaving directory '/c/code/HEAD/testsuite'

['libraries/array/', 'libraries/base/', 'libraries/binary/', 'libraries/bytestring/', 'libraries/Cabal/Cabal', 'libraries/Cabal/', 'libraries/compact/', 'libraries/containers/', 'libraries/deepseq/', 'libraries/directory/', 'libraries/doc/', 'libraries/dph/dph-base', 'libraries/dph/dph-prim-interface', 'libraries/dph/dph-prim-seq', 'libraries/dph/dph-prim-par', 'libraries/dph/dph-lifted-base', 'libraries/dph/dph-lifted-boxed', 'libraries/dph/dph-lifted-copy', 'libraries/dph/dph-lifted-vseg', 'libraries/dph/', 'libraries/dph/', 'libraries/filepath/', 'libraries/ghc-boot/', 'libraries/ghc-boot-th/', 'libraries/ghc-compact/', 'libraries/ghc-prim/', 'libraries/ghci/', 'libraries/haskeline/', 'libraries/hoopl/', 'libraries/hpc/', 'libraries/integer-gmp/', 'libraries/integer-simple/', 'libraries/mtl/', 'libraries/parallel/', 'libraries/parsec/', 'libraries/pretty/', 'libraries/primitive/', 'libraries/process/', 'libraries/random/', 'libraries/stm/', 'libraries/template-haskell/', 'libraries/terminfo/', 'libraries/text/', 'libraries/time/', 'libraries/transformers/', 'libraries/unix/', 'libraries/vector/', 'libraries/Win32/', 'libraries/xhtml/']

Creating libraries/array/ghc.mk

Creating libraries/base/ghc.mk

Creating libraries/binary/ghc.mk

Creating libraries/bytestring/ghc.mk

Creating libraries/Cabal/Cabal/ghc.mk

Creating libraries/containers/ghc.mk

Creating libraries/deepseq/ghc.mk

Creating libraries/directory/ghc.mk

Creating libraries/dph/dph-base/ghc.mk

Creating libraries/dph/dph-prim-interface/ghc.mk

Creating libraries/dph/dph-prim-seq/ghc.mk

Creating libraries/dph/dph-prim-par/ghc.mk

Creating libraries/dph/dph-lifted-base/ghc.mk

Creating libraries/dph/dph-lifted-boxed/ghc.mk

Creating libraries/dph/dph-lifted-copy/ghc.mk

Creating libraries/dph/dph-lifted-vseg/ghc.mk

Creating libraries/filepath/ghc.mk

Creating libraries/ghc-boot/ghc.mk

Creating libraries/ghc-boot-th/ghc.mk

Creating libraries/ghc-compact/ghc.mk

Creating libraries/ghc-prim/ghc.mk

Creating libraries/ghci/ghc.mk

Creating libraries/haskeline/ghc.mk

Creating libraries/hoopl/ghc.mk

Creating libraries/hpc/ghc.mk

Creating libraries/integer-gmp/ghc.mk

Creating libraries/integer-simple/ghc.mk

Creating libraries/mtl/ghc.mk

Creating libraries/parallel/ghc.mk

Creating libraries/parsec/ghc.mk

Creating libraries/pretty/ghc.mk

Creating libraries/primitive/ghc.mk

Creating libraries/process/ghc.mk

Creating libraries/random/ghc.mk

Creating libraries/stm/ghc.mk

Creating libraries/template-haskell/ghc.mk

Creating libraries/terminfo/ghc.mk

Creating libraries/text/ghc.mk

Creating libraries/time/ghc.mk

Creating libraries/transformers/ghc.mk

Creating libraries/unix/ghc.mk

Creating libraries/vector/ghc.mk

Creating libraries/Win32/ghc.mk

Creating libraries/xhtml/ghc.mk

Booting .

Booting libraries/base/

Booting libraries/directory/

Booting libraries/integer-gmp/

Booting libraries/process/

Booting libraries/terminfo/

Booting libraries/time/

Booting libraries/unix/

checking for gfind... no

checking for find... /usr/bin/find

checking for sort... /usr/bin/sort

checking for GHC version date... inferred 8.3.20171004

checking for GHC Git commit id... inferred 3030eee24c9d538f7ae2c854fd86129563b6ddf3

checking for ghc... /c/fp/ghc-8.0.2/bin/ghc

checking version of ghc... 8.0.2

GHC path canonicalised to: c:/fp/ghc-8.0.2/bin/ghc

checking build system type... x86_64-pc-msys

checking host system type... x86_64-pc-msys

checking target system type... x86_64-pc-msys

Build platform inferred as: x86_64-unknown-mingw32

Host platform inferred as: x86_64-unknown-mingw32

Target platform inferred as: x86_64-unknown-mingw32

Unknown OS msys

/c/code/HEAD$ git pull

Already up-to-date.

/c/code/HEAD$ git submodule update

/c/code/HEAD$
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