Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: transformers-compat (user goal)
rejecting: transformers-compat-0.5.1.4, 0.5.1.3, 0.5.1.2, 0.5.0.4 (global
constraint requires ==0.5.0.3)
trying: transformers-compat-0.5.0.3
trying: base-4.8.1.0/installed-4f7... (dependency of
transformers-compat-0.5.0.3)
next goal: transformers (dependency of transformers-compat-0.5.0.3)
rejecting: transformers-0.4.2.0/installed-21d..., 0.5.1.0, 0.5.0.1, 0.5.0.0,
0.4.3.0, 0.4.2.0, 0.4.1.0 (conflict: transformers-compat-0.5.0.3:three =>
transformers>=0.3 && <0.4)
trying: transformers-0.3.0.0
rejecting: transformers-0.3.0.0:+applicativeinbase (conflict:
base==4.8.1.0/installed-4f7..., transformers-0.3.0.0:applicativeinbase =>
base>=2 && <4.8)
rejecting: transformers-0.3.0.0:-applicativeinbase (conflict:
base==4.8.1.0/installed-4f7..., transformers-0.3.0.0:applicativeinbase =>
base>=1.0 && <2)
Dependency tree exhaustively searched.