Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of fclabels-0.1.2)
next goal: monads-fd (dependency of fclabels-0.1.2)
rejecting: monads-fd-0.2.0.0, monads-fd-0.1.0.4, monads-fd-0.1.0.3,
monads-fd-0.1.0.2, monads-fd-0.1.0.1, monads-fd-0.1.0.0 (conflict: fclabels =>
monads-fd==0.0.*)
trying: monads-fd-0.0.0.1
next goal: transformers (dependency of monads-fd-0.0.0.1)
rejecting: transformers-0.5.2.0/installed-0.5..., transformers-0.5.2.0,
transformers-0.5.1.0, transformers-0.5.0.1, transformers-0.5.0.0,
transformers-0.4.3.0, transformers-0.4.2.0, transformers-0.4.1.0,
transformers-0.3.0.0, transformers-0.2.2.1, transformers-0.2.1.0,
transformers-0.2.0.0 (conflict: monads-fd => transformers>=0.1.4.0 && <0.2)
rejecting: transformers-0.1.4.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.3 || >=1.0 && <2)
rejecting: transformers-0.1.3.0, transformers-0.1.1.0, transformers-0.1.0.1,
transformers-0.0.1.0, transformers-0.0.0.0, transformers-0.5.0.2,
transformers-0.4.0.0, transformers-0.2.2.0, transformers-0.1.0.0 (conflict:
monads-fd => transformers>=0.1.4.0 && <0.2)
Dependency tree exhaustively searched.