Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: comonad-extras (user goal)
rejecting: comonad-extras-4.0, comonad-extras-3.0.2, comonad-extras-3.0.1,
comonad-extras-3.0.0.1, comonad-extras-3.0, comonad-extras-2.1.2,
comonad-extras-2.1.1.2, comonad-extras-2.1.1.1, comonad-extras-2.1.1,
comonad-extras-2.1, comonad-extras-2.0.3, comonad-extras-2.0.2.1,
comonad-extras-2.0.2, comonad-extras-2.0, comonad-extras-0.4.0.3 (constraint
from user target requires ==0.4.0.2)
trying: comonad-extras-0.4.0.2
trying: base-4.9.0.0/installed-4.9... (dependency of comonad-extras-0.4.0.2)
next goal: transformers (dependency of comonad-extras-0.4.0.2)
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 (conflict: comonad-extras => transformers>=0.2.0 &&
<=0.3)
rejecting: transformers-0.2.2.1 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.8 || >=1.0 && <2)
rejecting: transformers-0.2.1.0, transformers-0.2.0.0 (conflict:
base==4.9.0.0/installed-4.9..., transformers => base>=2 && <4.3 || >=1.0 &&
<2)
rejecting: transformers-0.1.4.0, 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 (conflict: comonad-extras =>
transformers>=0.2.0 && <=0.3)
rejecting: transformers-0.2.2.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.6 || >=1.0 && <2)
rejecting: transformers-0.1.0.0 (conflict: comonad-extras =>
transformers>=0.2.0 && <=0.3)
Dependency tree exhaustively searched.