Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: confsolve (user goal)
rejecting: confsolve-0.5.4, 0.5.3, 0.5.2, 0.5.1, 0.5, 0.4.1, 0.3.8, 0.3.7,
0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1 (global constraint requires ==0.2)
trying: confsolve-0.2
trying: base-4.8.1.0/installed-4f7... (dependency of confsolve-0.2)
next goal: haskell98 (dependency of confsolve-0.2)
rejecting: haskell98-2.0.0.3, 2.0.0.2, 2.0.0.1, 2.0.0.0 (conflict: confsolve
=> haskell98>=1.1 && <1.2)
rejecting: haskell98-1.1.0.1, 1.1.0.0 (conflict:
base==4.8.1.0/installed-4f7..., haskell98 => base>=3 && <4.6)
rejecting: haskell98-1.0.1.1, 1.0.1.0, 1.0 (conflict: confsolve =>
haskell98>=1.1 && <1.2)
Dependency tree exhaustively searched.