checking for gfind... no
checking for find... /usr/bin/find
checking for sort... /usr/bin/sort
checking for GHC version date... given 8.1.20160101
checking for GHC Git commit id... inferred 8afeaad919dc67643b4eff14efafb48b59039b2b
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.