Resolving dependencies... cabal: Could not resolve dependencies: next goal: mathgenealogy (user goal) rejecting: mathgenealogy-1.3.0, 1.2.0, 1.1.1, 1.1.0, 1.0.0, 0.0.2 (global constraint requires ==0.0.1) trying: mathgenealogy-0.0.1 trying: base-4.7.0.1/installed-e4b... (dependency of mathgenealogy-0.0.1) next goal: haskell98 (dependency of mathgenealogy-0.0.1) rejecting: haskell98-2.0.0.3/installed-85b..., 2.0.0.3, 2.0.0.2, 2.0.0.1, 2.0.0.0 (conflict: mathgenealogy => haskell98>=1.1 && <1.2) rejecting: haskell98-1.1.0.1, 1.1.0.0 (conflict: base==4.7.0.1/installed-e4b..., haskell98 => base>=3 && <4.6) rejecting: haskell98-1.0.1.1, 1.0.1.0, 1.0 (conflict: mathgenealogy => haskell98>=1.1 && <1.2) Dependency tree exhaustively searched.