checking for gfind... no checking for find... /usr/bin/find checking for sort... /usr/bin/sort checking for GHC version date... given 8.1.20160120 checking for GHC Git commit id... inferred 975bdacb2c72b2ffd4eb8108896f9f984c5d4fcf 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.