freebsd-amd64-head (FreeBSD/amd64 HEAD (Gabor Pali)), build 869, Failure

[Builder]

freebsd-amd64-head (FreeBSD/amd64 HEAD (Gabor Pali)), build 869

Build failed
Details: http://haskell.inf.elte.hu/builders/freebsd-amd64-head/869.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/869.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 8.1.20160111
checking for GHC Git commit id... inferred b1c063b47a6a4d078626f9a2d4b07cbb244de340
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.