Resolving dependencies...
cabal: Could not resolve dependencies:
trying: lambdacat-0.1.1 (user goal)
trying: base-4.8.1.0/installed-4f7... (dependency of lambdacat-0.1.1)
next goal: containers (dependency of lambdacat-0.1.1)
rejecting: containers-0.5.6.2/installed-2de..., 0.5.6.3, 0.5.6.2, 0.5.6.1,
0.5.6.0, 0.5.5.1, 0.5.5.0, 0.5.4.0, 0.5.3.1, 0.5.3.0, 0.5.2.1, 0.5.2.0,
0.5.1.0, 0.5.0.0, 0.4.2.1, 0.4.2.0, 0.4.1.0, 0.4.0.0 (conflict: lambdacat =>
containers==0.3.*)
rejecting: containers-0.3.0.0 (conflict: base==4.8.1.0/installed-4f7...,
containers => base>=4.2 && <4.7)
rejecting: containers-0.2.0.1, 0.2.0.0, 0.1.0.1, 0.1.0.0 (conflict: lambdacat
=> containers==0.3.*)
Dependency tree exhaustively searched.