Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: vty-ui (user goal)
rejecting: vty-ui-1.9, vty-ui-1.8, vty-ui-1.7.1, vty-ui-1.7, vty-ui-1.6.1,
vty-ui-1.6, vty-ui-1.5.1, vty-ui-1.5, vty-ui-1.4, vty-ui-1.3.1, vty-ui-1.3
(constraint from user target requires ==1.2)
trying: vty-ui-1.2
trying: base-4.9.0.0/installed-4.9... (dependency of vty-ui-1.2)
next goal: array (dependency of vty-ui-1.2)
rejecting: array-0.5.1.1/installed-0.5..., array-0.5.1.1, array-0.5.1.0,
array-0.5.0.0, array-0.4.0.1, array-0.4.0.0 (conflict: vty-ui => array>=0.3 &&
<0.4)
rejecting: array-0.3.0.3 (conflict: base==4.9.0.0/installed-4.9..., array =>
base>=4.2 && <4.5)
rejecting: array-0.3.0.2, array-0.3.0.1 (conflict:
base==4.9.0.0/installed-4.9..., array => base>=4.2 && <4.4)
rejecting: array-0.3.0.0 (conflict: base==4.9.0.0/installed-4.9..., array =>
base>=3 && <4.4)
rejecting: array-0.2.0.0, array-0.1.0.0 (conflict: vty-ui => array>=0.3 &&
<0.4)
Dependency tree exhaustively searched.