Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: linear (user goal)
rejecting: linear-1.20.5, linear-1.20.4, linear-1.20.3, linear-1.20.2,
linear-1.20.1, linear-1.20, linear-1.19.1.3, linear-1.19.1.2, linear-1.19.1.1,
linear-1.19.1, linear-1.19, linear-1.18.3, linear-1.18.1.1, linear-1.18.1,
linear-1.18.0.1, linear-1.18, linear-1.17.1, linear-1.17, linear-1.16.4,
linear-1.16.2, linear-1.16.1, linear-1.16, linear-1.15.5, linear-1.15.4,
linear-1.15.3, linear-1.15.2, linear-1.15.1, linear-1.15.0.1, linear-1.15,
linear-1.14.0.1, linear-1.14, linear-1.13, linear-1.12.1, linear-1.11.3,
linear-1.11.2, linear-1.11.1, linear-1.11, linear-1.10.1.2, linear-1.10.1.1,
linear-1.10.1, linear-1.10, linear-1.9.1, linear-1.9.0.1, linear-1.9,
linear-1.8.1, linear-1.8, linear-1.7, linear-1.6, linear-1.4, linear-1.3.1.1,
linear-1.3.1, linear-1.3, linear-1.2, linear-1.1.4, linear-1.1.2,
linear-1.1.1, linear-1.0.1, linear-0.9.2, linear-0.9.1, linear-0.9 (constraint
from user target requires ==0.8)
trying: linear-0.8
next goal: base (dependency of linear-0.8)
rejecting: base-4.9.0.0/installed-4.9... (conflict: linear => base<0)
rejecting: base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0,
base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0,
base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0,
base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0,
base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable
package requires installed instance)
Dependency tree exhaustively searched.