Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: trifecta (user goal)
rejecting: trifecta-1.5.2, 1.5.1.3, 1.5.1.2, 1.5.1.1, 1.5.1, 1.5, 1.4.3,
1.4.2, 1.4.1, 1.4, 1.2.1.1, 1.2.1, 1.2, 1.1, 1.0, 0.53, 0.52, 0.51.0.1, 0.51,
0.50.2.1, 0.50.1, 0.50, 0.49.1, 0.49, 0.47, 0.46, 0.45, 0.44, 0.43, 0.42,
0.41, 0.40, 0.39, 0.38, 0.37, 0.36.3, 0.36.2, 0.36.1, 0.36 (global constraint
requires ==0.35)
trying: trifecta-0.35
next goal: base (dependency of trifecta-0.35)
rejecting: base-4.8.1.0/installed-4f7... (conflict: trifecta => base>=4.3 &&
<4.4)
rejecting: base-4.8.1.0, 4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0,
4.5.1.0, 4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1,
4.2.0.0, 4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires
installed instance)
Dependency tree exhaustively searched.