Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: ghc-mod (user goal)
rejecting: ghc-mod-5.4.0.0, 5.3.0.0, 5.2.1.2, 5.2.1.1, 5.2.1.0, 5.2.0.0,
5.1.1.0, 5.1.0.2, 5.1.0.1 (global constraint requires ==5.1.0.0)
trying: ghc-mod-5.1.0.0
trying: base-4.8.1.0/installed-4f7... (dependency of ghc-mod-5.1.0.0)
next goal: monad-journal (dependency of ghc-mod-5.1.0.0)
rejecting: monad-journal-0.7.1, 0.7, 0.6.0.2, 0.6.0.1, 0.6, 0.5.0.1, 0.5,
0.4.0.2, 0.4.0.1, 0.4, 0.3, 0.2.4, 0.2.3.2 (conflict: ghc-mod =>
monad-journal>=0.2.2.0 && <0.2.3.2)
rejecting: monad-journal-0.2.3.1, 0.2.3.0, 0.2.2.0 (conflict:
base==4.8.1.0/installed-4f7..., monad-journal => base>=4.5 && <4.8)
rejecting: monad-journal-0.2.1.2, 0.2.1.1, 0.2.1.0, 0.2.0.0, 0.1.0.0
(conflict: ghc-mod => monad-journal>=0.2.2.0 && <0.2.3.2)
Dependency tree exhaustively searched.