@@ -975,8 +975,11 @@ Library
975975 , vector < 0.12
976976 , vector-binary-instances < 0.3
977977 , zip-archive > 0.2.3.5 && < 0.2.4
978− , zlib < 0.6
979978 , safe
979+ -- zlib >= 0.6.1 is broken with GHC < 7.10.3
980+ if impl(ghc < 7.10.3)
981+ build-depends: zlib < 0.6.1
982+
980983 Extensions: MultiParamTypeClasses
981984 , DeriveFoldable
982985 , DeriveTraversable