Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: vty-ui (user goal)
rejecting: vty-ui-1.9, 1.8, 1.7.1, 1.7, 1.6.1, 1.6 (global constraint requires
==1.5.1)
trying: vty-ui-1.5.1
trying: base-4.8.1.0/installed-4f7... (dependency of vty-ui-1.5.1)
next goal: array (dependency of vty-ui-1.5.1)
rejecting: array-0.5.1.0/installed-d42..., 0.5.1.0, 0.5.0.0 (conflict: vty-ui
=> array>=0.3.0.0 && <0.5.0.0)
rejecting: array-0.4.0.1 (conflict: base==4.8.1.0/installed-4f7..., array =>
base>=4.2 && <4.7)
rejecting: array-0.4.0.0 (conflict: base==4.8.1.0/installed-4f7..., array =>
base>=4.2 && <4.6)
rejecting: array-0.3.0.3 (conflict: base==4.8.1.0/installed-4f7..., array =>
base>=4.2 && <4.5)
rejecting: array-0.3.0.2, 0.3.0.1 (conflict: base==4.8.1.0/installed-4f7...,
array => base>=4.2 && <4.4)
rejecting: array-0.3.0.0 (conflict: base==4.8.1.0/installed-4f7..., array =>
base>=3 && <4.4)
rejecting: array-0.2.0.0, 0.1.0.0 (conflict: vty-ui => array>=0.3.0.0 &&
<0.5.0.0)
Dependency tree exhaustively searched.