Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: trifecta (user goal)
rejecting: trifecta-1.6.1, trifecta-1.6, trifecta-1.5.2, trifecta-1.5.1.3,
trifecta-1.5.1.2, trifecta-1.5.1.1, trifecta-1.5.1, trifecta-1.5,
trifecta-1.4.3, trifecta-1.4.2, trifecta-1.4.1, trifecta-1.4,
trifecta-1.2.1.1, trifecta-1.2.1, trifecta-1.2, trifecta-1.1, trifecta-1.0,
trifecta-0.53, trifecta-0.52, trifecta-0.51.0.1, trifecta-0.51,
trifecta-0.50.2.1, trifecta-0.50.1, trifecta-0.50, trifecta-0.49.1 (constraint
from user target requires ==0.49)
trying: trifecta-0.49
trying: base-4.9.0.0/installed-4.9... (dependency of trifecta-0.49)
next goal: terminfo (dependency of trifecta-0.49)
rejecting: terminfo-0.4.0.2/installed-0.4..., terminfo-0.4.0.2,
terminfo-0.4.0.1, terminfo-0.4.0.0 (conflict: trifecta => terminfo>=0.3.2 &&
<0.4)
rejecting: terminfo-0.3.2.6, terminfo-0.3.2.5, terminfo-0.3.2.4 (conflict:
base==4.9.0.0/installed-4.9..., terminfo => base>=4.0 && <4.8)
rejecting: terminfo-0.3.2.3, terminfo-0.3.2.2, terminfo-0.3.2.1,
terminfo-0.3.2 (conflict: base==4.9.0.0/installed-4.9..., terminfo =>
base>=1.0 && <4.8)
rejecting: terminfo-0.3.1.3, terminfo-0.3.1.2, terminfo-0.3.1.1,
terminfo-0.3.1, terminfo-0.3.0.2, terminfo-0.3.0.1, terminfo-0.3,
terminfo-0.2.2.1, terminfo-0.2.2, terminfo-0.2.1, terminfo-0.2, terminfo-0.1
(conflict: trifecta => terminfo>=0.3.2 && <0.4)
Dependency tree exhaustively searched.