freebsd-amd64-head (FreeBSD/amd64 HEAD (Gabor Pali)), build 966, Failure

[Builder]

freebsd-amd64-head (FreeBSD/amd64 HEAD (Gabor Pali)), build 966

Build failed
Details: http://haskell.inf.elte.hu/builders/freebsd-amd64-head/966.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/966.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 8.1.20160420
checking for GHC Git commit id... inferred 81b14c141dc385dbb0de00ea72217185cfa22a09
checking for ghc... /usr/local/bin/ghc
checking version of ghc... 7.10.2
checking build system type... x86_64-unknown-freebsd9.3
checking host system type... x86_64-unknown-freebsd9.3
checking target system type... x86_64-unknown-freebsd9.3
Build platform inferred as: x86_64-portbld-freebsd
Host platform inferred as: x86_64-portbld-freebsd
Target platform inferred as: x86_64-portbld-freebsd
GHC build  : x86_64-portbld-freebsd
GHC host   : x86_64-portbld-freebsd
GHC target : x86_64-portbld-freebsd
checking for path to top of build tree... /usr/home/ghc-builder/work/builder/tempbuild/build
configure: error: --with-gcc=/usr/local/bin/gcc48 is obsolete (use './configure CC=/usr/local/bin/gcc48' or 'CC=/usr/local/bin/gcc48 ./configure' instead)