Resolving dependencies... cabal: Could not resolve dependencies: next goal: hieraclus (user goal) rejecting: hieraclus-0.1.2.1, hieraclus-0.1.2, hieraclus-0.1.1.2, hieraclus-0.1.1.1 (constraint from user target requires ==0.1.1) trying: hieraclus-0.1.1 trying: base-4.9.0.0/installed-4.9... (dependency of hieraclus-0.1.1) next goal: hstats (dependency of hieraclus-0.1.1) rejecting: hstats-0.3.0.1 (conflict: base==4.9.0.0/installed-4.9..., hstats => base>=3.0 && <4.9) trying: hstats-0.3 next goal: haskell98 (dependency of hieraclus-0.1.1) rejecting: haskell98-2.0.0.3, haskell98-2.0.0.2, haskell98-2.0.0.1, haskell98-2.0.0.0 (conflict: hstats => haskell98<2) rejecting: haskell98-1.1.0.1, haskell98-1.1.0.0, haskell98-1.0.1.1 (conflict: base==4.9.0.0/installed-4.9..., haskell98 => base>=3 && <4.6) rejecting: haskell98-1.0.1.0 (conflict: base==4.9.0.0/installed-4.9..., haskell98 => base<4.6) rejecting: haskell98-1.0 (conflict: base==4.9.0.0/installed-4.9..., haskell98 => base<4.3) Dependency tree exhaustively searched.