Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: linear (user goal)
rejecting: linear-1.18.1.1, 1.18.1, 1.18.0.1, 1.18, 1.17.1, 1.17, 1.16.4,
1.16.2, 1.16.1, 1.16, 1.15.5, 1.15.4, 1.15.3, 1.15.2, 1.15.1, 1.15.0.1, 1.15,
1.14.0.1, 1.14, 1.13, 1.12.1, 1.11.3, 1.11.2, 1.11.1, 1.11, 1.10.1.2,
1.10.1.1, 1.10.1, 1.10, 1.9.1, 1.9.0.1, 1.9, 1.8.1, 1.8, 1.7, 1.6, 1.4,
1.3.1.1, 1.3.1, 1.3, 1.2, 1.1.4, 1.1.2, 1.1.1, 1.0.1, 0.9.2, 0.9.1, 0.9
(global constraint requires ==0.8)
trying: linear-0.8
next goal: base (dependency of linear-0.8)
rejecting: base-4.7.0.1/installed-e4b... (conflict: linear => base<0)
rejecting: base-4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0, 4.5.1.0,
4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1, 4.2.0.0,
4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires installed
instance)
Dependency tree exhaustively searched.