windows-x86_64-head (Windows/x86_64 HEAD (Gabor Pali)), build 33, Failure

[Builder]

windows-x86_64-head (Windows/x86_64 HEAD (Gabor Pali)), build 33

Build failed
Details: http://haskell.inf.elte.hu/builders/windows-x86_64-head/33.html

git clone                    | Success
create mk/build.mk           | Success
get subrepos                 | Success
repo versions                | Success
touching clean-check files   | Success
setting version date         | Success
booting                      | Success
configuring                  | Success
creating check-remove-before | Success
compiling                    | Failure: Just (ExitFailure 2)

Build failed
Details: http://haskell.inf.elte.hu/builders/windows-x86_64-head/33.html

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"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] hs -o libraries/base/dist-install/build/Foreign.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] libraries/base/dist-install/build/GHC/Conc/Sync.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] /base/dist-install/build/Control/Exception/Base.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] aries/base/dist-install/build/Control/Exception.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] raries/base/dist-install/build/System/IO/Unsafe.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] -o libraries/base/dist-install/build/Data/IORef.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] s/base/dist-install/build/GHC/IO/Encoding/UTF32.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] s/base/dist-install/build/GHC/IO/Encoding/UTF16.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] /base/dist-install/build/GHC/IO/Encoding/Latin1.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] st-install/build/GHC/IO/Encoding/CodePage/Table.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] libraries/base/dist-install/build/GHC/IO/IOMode.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...]  -o libraries/base/dist-install/build/Text/Show.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] braries/base/dist-install/build/System/IO/Error.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] ries/base/dist-install/build/System/Posix/Types.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -h [...] /base/dist-install/build/System/Posix/Internals.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key bas [...]  -split-objs  -c libraries/base/./GHC/Windows.hs -o libraries/base/dist-install/build/GHC/Windows.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key bas [...] GHC/IO/Encoding/CodePage/API.hs -o libraries/base/dist-install/build/GHC/IO/Encoding/CodePage/API.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key bas [...] /base/./GHC/IO/Encoding/CodePage.hs -o libraries/base/dist-install/build/GHC/IO/Encoding/CodePage.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key bas [...] objs  -c libraries/base/./GHC/IO/Encoding.hs -o libraries/base/dist-install/build/GHC/IO/Encoding.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key bas [...] split-objs  -c libraries/base/./Foreign/Safe.hs -o libraries/base/dist-install/build/Foreign/Safe.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key bas [...] es/base/./GHC/IO/Handle/Internals.hs -o libraries/base/dist-install/build/GHC/IO/Handle/Internals.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key base_ESD4aQEEWwsHtYJVc1BwtJ -hide-all-packages -i  [...] dir libraries/base/dist-install/build -split-objs  -c libraries/base/./GHC/Conc/Windows.hs -o libraries/base/dist-install/build/GHC/Conc/Windows.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key base_ESD4aQEEWwsHtYJVc1BwtJ -hide-all-packages -i -ilibraries/base/. -ilibraries/base/dist-install/build -ilibraries/base/dist-install/build/autogen -Ilibraries/base/dist-install/build -Ilibraries/base/dist-install/build/autogen -Ilibraries/base/include   -optP-DOPTIMISE_INTEGER_GCD_LCM -optP-include -optPlibraries/base/dist-install/build/autogen/cabal_macros.h -package-key ghcpr_BE58KUgBe9ELCsPXiJ1Q2r -package-key integ_BcPVjqcazPNGsNFG4agFty -package-key rts -this-package-key base -XHaskell2010 -O2  -no-user-package-db -rtsopts      -odir libraries/base/dist-install/build -hidir libraries/base/dist-install/build -stubdir libraries/base/dist-install/build -split-objs  -c libraries/base/./GHC/Conc/IO.hs -o libraries/base/dist-install/build/GHC/Conc/IO.o 
"inplace/bin/ghc-stage1.exe" -hisuf hi -osuf  o -hcsuf hc -static  -H32m -O    -this-package-key base_ESD4aQEEWwsHtYJVc1BwtJ -hide-all-packages -i -ilibraries/base/. -ilibraries/base/dist-install/build -ilibraries/base/dist-install/build/autogen -Ilibraries/base/dist-install/build -Ilibraries/base/dist-install/build/autogen -Ilibraries/base/include   -optP-DOPTIMISE_INTEGER_GCD_LCM -optP-include -optPlibraries/base/dist-install/build/autogen/cabal_macros.h -package-key ghcpr_BE58KUgBe9ELCsPXiJ1Q2r -package-key integ_BcPVjqcazPNGsNFG4agFty -package-key rts -this-package-key base -XHaskell2010 -O2  -no-user-package-db -rtsopts      -odir libraries/base/dist-install/build -hidir libraries/base/dist-install/build -stubdir libraries/base/dist-install/build -split-objs  -c libraries/base/./GHC/IO/FD.hs -o libraries/base/dist-install/build/GHC/IO/FD.o 

libraries\base\GHC\IO\FD.hs:262:5: Not in scope: `unless'
libraries/base/ghc.mk:4: recipe for target 'libraries/base/dist-install/build/GHC/IO/FD.o' failed
make[1]: *** [libraries/base/dist-install/build/GHC/IO/FD.o] Error 1
Makefile:71: recipe for target 'all' failed
make: *** [all] Error 2