Resolving dependencies... cabal: Could not resolve dependencies: next goal: normaldistribution (user goal) rejecting: normaldistribution-1.1.0.3, 1.1.0.2, 1.1.0.1 (global constraint requires ==1.1) trying: normaldistribution-1.1 trying: base-4.7.0.1/installed-e4b... (dependency of normaldistribution-1.1) next goal: haskell98 (dependency of normaldistribution-1.1) rejecting: haskell98-2.0.0.3/installed-85b..., 2.0.0.3, 2.0.0.2, 2.0.0.1, 2.0.0.0, 1.1.0.1, 1.1.0.0 (conflict: normaldistribution => haskell98<1.1) rejecting: haskell98-1.0.1.1 (conflict: base==4.7.0.1/installed-e4b..., haskell98 => base>=3 && <4.6) rejecting: haskell98-1.0.1.0 (conflict: base==4.7.0.1/installed-e4b..., haskell98 => base<4.6) rejecting: haskell98-1.0 (conflict: base==4.7.0.1/installed-e4b..., haskell98 => base<4.3) Dependency tree exhaustively searched.