freebsd-amd64-head (FreeBSD/amd64 HEAD (Gabor Pali)), build 880, Failure

[Builder]

freebsd-amd64-head (FreeBSD/amd64 HEAD (Gabor Pali)), build 880

Build failed
Details: http://haskell.inf.elte.hu/builders/freebsd-amd64-head/880.html

git clone                    | Success
git clone (Windows tarballs) | Success
create mk/build.mk           | 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/freebsd-amd64-head/880.html

-------------- next part --------------
checking for gfind... no
checking for find... /usr/bin/find
checking for sort... /usr/bin/sort
checking for GHC version date... given 8.1.20160122
checking for GHC Git commit id... inferred b617e9fe9ce22fb108b7e4a6694167dd893b9dfc
checking for ghc... /usr/local/bin/ghc
checking version of ghc... 7.8.3
configure: error: GHC version 7.10 or later is required to compile GHC.