Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hurdle (user goal)
rejecting: hurdle-0.4.0 (constraint from user target requires ==0.3.0)
trying: hurdle-0.3.0
trying: base-4.9.0.0/installed-4.9... (dependency of hurdle-0.3.0)
next goal: deepseq (dependency of containers-0.5.9.1)
rejecting: deepseq-1.4.2.0/installed-1.4... (conflict: deepseq =>
array==0.5.1.1/installed-0.5..., hurdle => array>=0.2.0.0 && <0.4)
trying: deepseq-1.4.2.0
next goal: array (dependency of hurdle-0.3.0)
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: hurdle =>
array>=0.2.0.0 && <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 (conflict: deepseq => array>=0.3 && <0.6)
rejecting: array-0.1.0.0 (conflict: hurdle => array>=0.2.0.0 && <0.4)
Dependency tree exhaustively searched.