Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: intervals (user goal)
rejecting: intervals-0.7.2, intervals-0.7.1, intervals-0.7.0.1, intervals-0.7,
intervals-0.6, intervals-0.5.1.1, intervals-0.5.1, intervals-0.5,
intervals-0.4.2, intervals-0.4.1, intervals-0.4, intervals-0.3,
intervals-0.2.2.1, intervals-0.2.2, intervals-0.2.1.1, intervals-0.2.1,
intervals-0.2.0.3, intervals-0.2.0.2, intervals-0.2.0.1 (constraint from user
target requires ==0.2.0)
trying: intervals-0.2.0
trying: base-4.9.0.0/installed-4.9... (dependency of intervals-0.2.0)
next goal: array (dependency of intervals-0.2.0)
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: intervals =>
array>=0.3.0 && <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: intervals => array>=0.3.0
&& <0.4)
Dependency tree exhaustively searched.