Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gmndl (user goal)
rejecting: gmndl-0.4.0.2 (global constraint requires ==0.3)
trying: gmndl-0.3
trying: base-4.8.1.0/installed-4f7... (dependency of gmndl-0.3)
next goal: array (dependency of gmndl-0.3)
rejecting: array-0.5.1.0/installed-d42..., 0.5.1.0, 0.5.0.0, 0.4.0.1, 0.4.0.0
(conflict: gmndl => array>=0.3 && <0.4)
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: gmndl => array>=0.3 && <0.4)
Dependency tree exhaustively searched.