linux-ppc64-head (Linux/ppc64 HEAD (Karel Gardas)), build 61, Failure

[Builder]

linux-ppc64-head (Linux/ppc64 HEAD (Karel Gardas)), build 61

Build failed
Details: http://haskell.inf.elte.hu/builders/linux-ppc64-head/61.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                | Failure: Just (ExitFailure 1)

Build failed
Details: http://haskell.inf.elte.hu/builders/linux-ppc64-head/61.html

-------------- next part --------------
checking for .subsections_via_symbols... no
checking whether your assembler supports .ident directive... yes
checking for GNU non-executable stack support... yes
checking for a working context diff... diff -U 1
checking for a BSD-compatible install... /usr/bin/install -c
checking for ar... /usr/bin/ar
checking whether /usr/bin/ar is GNU ar... yes
checking for ar arguments... q
checking whether /usr/bin/ar supports @file... yes
checking for ranlib... /usr/bin/ranlib
checking whether ln -s works... yes
checking for gsed... no
checking for sed... /usr/bin/sed
checking for time... /usr/bin/time
checking for gnutar... no
checking for gtar... /usr/bin/gtar
checking for gpatch... no
checking for patch... /usr/bin/patch
checking for dtrace... /usr/bin/dtrace
checking for HsColour... no
checking for xmllint... /usr/bin/xmllint
checking for DocBook DTD... ok
checking for xsltproc... /usr/bin/xsltproc
checking for DocBook XSL stylesheet... yes
checking for dblatex... no
configure: WARNING: cannot find dblatex in your PATH, you will not be able to build the PDF and PS documentation
checking for ghc-pkg matching /home/kgardas/sfw/ghc-7.8.0.20140228/bin/ghc... /home/kgardas/sfw/ghc-7.8.0.20140228/bin/ghc-pkg
checking for happy... /home/kgardas/.cabal/bin/happy
checking for version of happy... 1.19.3
configure: error: Happy version 1.19.4 or later is required to compile GHC.