Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: algebra (user goal)
rejecting: algebra-4.2, 4.1, 4.0, 3.1 (global constraint requires ==3.0.2)
trying: algebra-3.0.2
trying: void-0.7.1 (dependency of algebra-3.0.2)
trying: hashable-1.2.3.3 (dependency of void-0.7.1)
trying: bytestring-0.10.6.0/installed-236... (dependency of hashable-1.2.3.3)
next goal: deepseq (dependency of void-0.7.1)
rejecting: deepseq-1.4.1.1/installed-8fb... (conflict: deepseq =>
array==0.5.1.0/installed-d42..., algebra => array>=0.3.0.2 && <0.5)
rejecting: deepseq-1.4.1.2, 1.4.1.1, 1.4.1.0, 1.4.0.0, 1.3.0.2, 1.3.0.1,
1.3.0.0, 1.2.0.1, 1.2.0.0, 1.1.0.2, 1.1.0.1, 1.1.0.0, 1.0.0.0 (conflict:
bytestring => deepseq==1.4.1.1/installed-8fb...)
Dependency tree exhaustively searched.